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The heat required to melt the ice is called the latent heat of fusion. Since this change occurs at constant pressure this heat is an enthalpy and is sometimes given the symbol fus H. This is the difference in enthalpy of the solid and liquid. Latent heat is measured in units of J/kg. Both Lf and Lv depend on the substance, particularly on the strength of its molecular forces as noted earlier. Lf and Lv are collectively called latent heat coe cients . They are latent , or hidden, because in phase changes, energy enters or leaves a system without causing May 12, 2014 · The enthalpy of fusion also know as '(latent)''''heat of fusion is the change in enthalpy resulting from heating a given quantity of a substance to change its state from a solid to a liquid. The temperature at which this occurs is the melting point.

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If latent heat of fusion of ice is 80 cals per g at 0°C, calculate molal depression constant for water. Latent heat is the heat change related to the change of state (solid / liquid/gas). 1 0. 79.72 cal/g is what the international standard so it is more correct that 80. Heat of Sublimation Lab AP Chemistry Unit 3 – Thermochemistry Modic Data Analysis: 1. Calculate the heat lost by the water. Express your answer in kilojoules. 2. Assuming the heat lost by the water was all absorbed by the dry ice, calculate the latent heat of sublimation for dry ice. (in kilojoules per mole) 3. Latent Heat Of Vaporization Electrostatic Attraction Between Ions Physics And Chemistry Latent Heat Of Fusion Shape And Volume. Newly added. Try our newest study sets that focus on Latent Heat Of Fusion to increase your studying efficiency and retention.

- Reader view. Latent heat of fusion. Introduction. In this lab we learn how to calibrate a calorimeter and how to use it to collect data. we calculate the amount of heat required to change a substances from solid state to liquid state.Jul 27, 2016 · Specific latent heat calculation practice for GCSE. Answers included.
- 3. Calculate amount of heat transferred for the solution (q = s m T). s = 4.18 J/(g∙C) 4. Determine heat evolved or absorbed by the reaction (q rxn = – q soln). 5. Calculate molar mass of urea from the formula CO(NH 2) 2. 6. Calculate the number of moles of urea (from mass and molar mass). Hint: Look at unit of mass and units of molar mass. 7. At which stages the specific latent heat released? ... Latent Heat of Fusion & Vaporization DRAFT. ... Calculate the amount of energy required to melt 35.0 grams of ice. Latent heat is measured in units of J/kg. Both L f L f size 12{L rSub { size 8{f} } } {} and L v L v size 12{L rSub { size 8{v} } } {} depend on the substance, particularly on the strength of its molecular forces as noted earlier. L f L f size 12{L rSub { size 8{f} } } {} and L v L v size 12{L rSub { size 8{v} } } {} are collectively called ... Online calculator to find the enthalpy / latent heat of fusion. The description of Latent Heat of Fusion Calc. The change in enthalpy can be found by considering the mass and quantity of a material.
- Latent heat of fusion or vaporization: Q= mol ∆H Q= kJ ∆H= change in heat mol= # moles Change in energy ∆H fus= 6.009kj/mol *(b-c) ∆H vap = 40.79kJ/mol) *(d-e) Examples: Find the amount of energy that would be required to melt 2.12 mole of solid water and turn it in-to a liquid
- com.hiox.latent_heat_of_fusion_calculator. GeoGebra Graphing Calculator. International GeoGebra Institute · Edukacja. 4,5 ★ 10 000 000+.May 23, 2013 · That is the Latent warmth required to soften ice at 0°C, with out a temperature alternate. Ninety seven.8g x 335J/g = 32,763 Joules/1000J/kJ = 32.8kJ. 'Fusion' is the correct time period in Physics for the approach of converting a high-quality to a liquid at a designated temperature and stress.
- That's latent heat of fusion that we need, and the latent heat of fusion for water is about 333,000 joules per kilogram which gives you 999,000 joules of heat in order to turn this ice at zero degree Celsius into water at zero degrees Celsius. 1. Define “heat of fusion”. 2. When 27.2 g of solid A, at its melting point of 34.0 °C, was added to 62.7 g of liquid A at 51.2 °C, the mixture cooled to 35.0 °C, with no solid remaining. Given the specific heat of liquid A (CP = 0.798 J/g·°C), find the heat of fusion per gram of solid A. Step 1 A→ (s) → 34.0 °C 34.0°C SKETCH
- This article has an unclear citation style . The references used may be made clearer with a different or consistent style of citation and footnoting . (March 2016) (Learn how and when to remove this template message) The enthalpy of vaporization (symbol ∆ H vap), also known as the (latent) heat of vaporization or heat of evaporation , is the amount of energy (enthalpy) that must be added to ... Calculate the molal depression constant of a solvent which has freezing point 16.6°C and latent heat of fusion 180.75 J g-1:
- tion. For components that are solids at the reference state, the latent heat of fusion must be included in the enthalpy calculation by modifying Eqn. 0.2 since solid properties are not calculable by con-ventional equations of state. One such modification might result in 0.3
- Cf. latent heat. 'heat of fusion' also found in these entries (note: many are not synonyms or translations)= heat of fusion. Heat of Fusion Example Problem 1. Question: The heat of fusion of water is 334 J/g. How much energy is required to melt 50 grams of ice into liquid water? Heat of Fusion Example Problem - Science Notes and Projects Latent heat, heat of fusion, heat of vaporization – problems and solutions. 1.
- Objectives: Determining the latent heat of fusion of water. Apparatus: LoggerPro, Vernier’s LabPro, Steam generator, hot plate, digital thermometer, thermal probe, calorimeter, ice, water, glass beaker, and electronic balance. Introduction: The specific heat c of a material is defined to be the amount of energy needed to The amount of heat energy released or absorbed when a solid changing to liquid at atmospheric pressure at its melting point is known as the latent heat of fusion. Ex: The latent heat of fusion of water is 79.72 cal/gram (or) 334.0 kJ/Kg.
- calculate the amount of heat required to convert 1 kg of ice at -10 degree Celsius into steam at 100 degree Celsius at normal pressure specific heat of ice = 2100 joules per kg Kelvin Latent heat of fusion of ice = 3.36 ×10^5 joule per kg specific heat capacity of water= 4200 joule per kg Kelvin and latent heat of vaporization of water= 2.25 10^6 J per kg Latent heat is the energy released or absorbed by a body or a thermodynamic system during a constant-temperature process. A typical example is a change of state of matter, meaning a phase transition such as the melting of ice or the boiling of water. A specific latent heat (L) expresses the amount of energy in the form of heat (Q) required to completely effect a phase change of a unit of mass ...
- Calculate the specific latent heat of fusion from this data. Answers (Don't Cheat!) Powered by Create your own unique website with customizable templates. Get Started.
- A gas was cooled and its temperature recorded over time. The graph shows the results: Explain what is happening at each stage in the graph. Use the words solid, liquid, gas, state change, melting, boiling, particles, internal energy, kinetic energy, potential energy, latent heat of fusion, latent heat of vaporisation.

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Defining specific heat, heat of fusion, and heat of vaporization. How to calculate the amount of heat to change the temperature of water and the energy required to change for a phase change. Class 11 Physics (India) Latent Heat of Fusion HEAT OF FUSION INTRODUCTION: In this lab you will determine the latent heat of fusion (L f) for water. PROCEDURE: 1. Weigh the mass of the inner aluminum cup (m c) of the calorimeter. 2. Fill the cup about half way with water and re-weigh the cup. 3. Determine the mass (m w) and initial temperature (T w) of the water. 4. Energy = 835 000 000J Since it is a change of state between a solid and a liquid, you will need to use the latent heat of fusion. Latent heat of fusion = 334 000 J/Kg Step 2: Substitute the numbers into the equation Energy required = mass x specific latent heat 835 000 000 J = mass x 334 000 Full text of "Latent heat of fusion of ice" See other formats A111D1 ETMT7T NAT'L INST OF STANDARDS & TECH R.I.C. A1 11 01 294979 /Bulletin of the Bureau of Standards QC1 .U5 V10;1914 C.2 NBS-PUB-C 1905 HE*S Bsra BR fewuuj KjQQnO H HH LATENT HEAT OF FUSION OF ICE By H. C. Dickinson, D. R. Harper 3d, and N. S. Osborne CONTENTS Page I. Review of previous work 235 1. "Latent heat or heat of fusion, is the amount of heat energy required to melt one pound of a given substance from solid to liquid state without a change in the substance temperature." Translated, in our application, it means, how much heat energy is required to completely melt 1 lb of ice. Jan 02, 2018 · 3,027,000 J or 3,027 kJ I studied this in chemistry although your process may be different. Formulas used: q=(mass)(specific heat capacity)(Final temp-Initial temp) q=(mass)(latent heat) H=sum up the amounts of q *q represents heat and H represent enthalpy First, In order to find the total amount of heat we need to break it into steps , since water is in different states and temperatures.

Jan 19, 2013 · Calculate the average of the two experimental values for the latent heat of fusion. An accepted value for the heat of fusion of ice is 3.34 X 10 5 J/kg. Compare your average experimental value with the accepted value. 3.

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The latent heat of fusion for a temperature, T', below the melting point is then: where c w and c i are the heat capacities of liquid water and ice respectively. interception of a line fit to the leading edge of the peak with the baseline. The latent heat is the area under the curve when plotted as power vs. time. The result of a temperature

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The Latent Heat Calculator helps you compute the energy released or absorbed during a phase transition like melting or vaporizing. In the text below we explain what is specific latent heat and present a simple latent heat calculation.Snow calculator solving for latent heat of fusion given heat content, liquid water density and snowpack water depth equivalent. Weather Meteorology Precipitation. Solve for latent heat of fusion.

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The fractional latent heat of a crystallizing system is simply the latent heat of fusion divided by the total enthalpy. When plotted against temperature, this function displays robust pulses with the successive saturation of each incoming crystal phase. Find the latent heat of fusion, Lf, according to Lf = q ÷ m by dividing the heat, q, absorbed by the ice, as determined in step 3, by the mass of ice, m Ice cubes. Paper towel. Calculator. Tips. If you need the latent heat of fusion in units other than joules per gram, such as calories per gram, use an online...Jul 10, 2012 · This short video takes demonstrates how to use the heat of fusion equation when solving heat problems. This is used for determining the amount of energy when an amount of ice is melted at 0 degrees Celsius. Q l = latent heat flow (Btu/hr) h we = 1060 - latent heat of vaporization of water (Btu/lb) ρ = 0.075 - air density at standard conditions (lb/ft 3) q = measured air flow (ft 3 /min) Δx = difference in humidity ratio (lb h2o /lb dry_air) Latent Heat Flow - SI-Units. The latent heat flow due to moisture in air can be expressed in SI-units (metric) as The latent heat of fusion and heat capacities of paraffin wax are important parameters in design and calculation of thermal energy storage system. 8. In the treatment of the latent heat of fusion , the temperature compensation method and enthalpy method are used. Latent heat of vaporization: Heat necessary to transform 1 kg of ebullient water into vapour without change of temperature (thermal energy necessary during the change of state liquid to the state vapour). Latent heat is the amount of heat added to or removed from a substance to produce a change in phase. This energy breaks down the intermolecular attractive forces, and also must provide the energy necessary to expand the gas (the pΔV work). When latent heat is added, no temperature change occurs. The enthalpy of vaporization is a function of ... Calculations Involving Specific Heat and Latent Heat of Phase Change Standard: Students know how to solve problems involving heat flow and temperature changes, using known values of specific heat and latent heat of phase change. Q l = latent heat flow (Btu/hr) h we = 1060 - latent heat of vaporization of water (Btu/lb) ρ = 0.075 - air density at standard conditions (lb/ft 3) q = measured air flow (ft 3 /min) Δx = difference in humidity ratio (lb h2o /lb dry_air) Latent Heat Flow - SI-Units. The latent heat flow due to moisture in air can be expressed in SI-units (metric) as Essay about Latent Heat of Fusion - 1111 Words. Studymode.com The specific latent heat of fusion for water is 334 KJ/ KG. Each substance has its own specific latent heat of fusion. There is also specific latent heat of vaporisation. But this is the amount of energy needed to turn a liquid into a gas, without increasing or decreasing the ... Latent Heat. The latent heat is the energy associated with a phase change of a substance. where the latent heat of fusion, Lf, and latent heat of vaporization, Lv, are material constants that are determined experimentally. Latent heat is an intensive property measured in units of J/kg. Lf and Lv are collectively called latent heat coefficients.

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calculate heat of solution: how to find standard heat of formation: how to calculate heat of formation from heat of combustion: steam saturation temperature formula: how to find hrxn: standard heat of reaction formula: use hess’s law to calculate the enthalpy change for the reaction: enthalpy unit conversion Latent heat of fusion, also known as the enthalpy of fusion is the change in enthalpy (total heat content of a system), that is the heat absorbed by a unit mass of a given solid at its melting point that completely converts the solid to a liquid at the same temperature.Sep 06, 2014 · (Specific latent heat of fusion of water = 330 000 Jkg -1) 3. 2 g of iron wire at 15 °C are dropped into liquid oxygen maintained at its boiling point in a vacuum flask. The volume of oxygen driven off, measured at 20 o C and 1.2 x 10 5 Pa, is 4.32 x 10 -4 m 3. Heat of Fusion Formula Questions: 1. What is the heat of fusion for water if it takes 668 Joules of heat energy to melt 2.00 grams? Answer: 2. What mass of water can be melted at 0°C if 1500 J of heat energy is applied? Answer: The heat of fusion for water is applied here and the equation is rearranged to solve for mass. Find the latent heat of fusion, Lf, according to Lf = q ÷ m by dividing the heat, q, absorbed by the ice, as determined in step 3, by the mass of ice, m Ice cubes. Paper towel. Calculator. Tips. If you need the latent heat of fusion in units other than joules per gram, such as calories per gram, use an online...Apr 25, 2010 · Calculate the minimum amount of energy, in joules, required to completely melt 206 g of silver initially at 15.2°C. The melting point of silver is at 962°C. Its specific heat capacity is 236 J/kg·K... Similarly, while ice melts, it remains at 0 °C (32 °F), and the liquid water that is formed with the latent heat of fusion is also at 0 °C. The heat of fusion for water at 0 °C is approximately 334 joules (79.7 calories) per gram, and the heat of vaporization at 100 °C is about 2,230 joules (533 calories) per gram. Calculate the energy for each of the following. E = m × L. 5 kg of water is evaporated at 100°C. Latent heat of vaporisation of water = 2,260,000 J/kg. 1 kg of ice is melting at 0°C. Latent heat of fusion of water = 334,000 J/kg. The boiling point of oxygen is at -183°C. Calculate the energy needed for 50g of Oxygen to evaporate at its ... specific latent heat of fusion and specific latent heat of vaporisation, Calculate the energy taking place when a substance changes state, examples and The following diagram shows the formula for specific latent heat. Scroll down the page for more examples and solutions on how to use the formula.

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The fractional latent heat of a crystallizing system is simply the latent heat of fusion divided by the total enthalpy. When plotted against temperature, this function displays robust pulses with the successive saturation of each incoming crystal phase. is commonly called it's "heat of fusion". This energy breaks down the solid bonds, but leaves a significant amount of energy associated with the intermolecular forces of the liquid state. The equation is Q = m Hfus where: Q = energy, m = mass and Hfus = heat of fusion The Hfus...

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Latent heat is the amount of heat added to or removed from a substance to produce a change in phase. When latent heat is added, no temperature change occurs. There are two types of latent heat. The first is the latent heat of fusion. This is the amount of heat added or removed to change phase between solid and liquid. The second type of latent ... The melting of a crystalline substance is a first-order transition, accompanied by an isothermal increase in enthalpy, the latent heat of fusion. Due to the impossibility of obtaining a pure crystalline phase in polymers, melting occurs over a range, and the enthalpy-temperature curve is S-shaped rather than discontinuous. The amount of heat energy absorbed or released for a phase change is known as latent heat. Formula of Latent Heat. The latent heat formula is given by, L = Q / M. Where, Q = amount of heat. M = mass of the substance. Solved Examples. Example 1. Determine the latent heat of 5 kg substance if the amount of heat for a phase change is 300 k.cal ... Specific Heat Capacity Latent Heat (Fusion) Latent Heat (Vaporization) Melting Points Boiling Points Density Air (room conditions) 1012 1.2 Aluminium 897 396938.1 10525716 660.32 2470 2700 Asphalt 920 Brass 375 168000 8400 to 8700 Brick 840 7400 to 8900 Bronze 435 910 2300 8730 Calcium 647 213084.5 3859973 842 1484 1550 Charcoal 840 Concrete 880 Radiation: heat transfer by electromagnetic radiation (commonly in the infra-red frequency range). Does not need the physical flow of matter, can occur through a vacuum. Heat of fusion, heat of vaporization Also called latent heat of fusion, enthalpy of fusion and latent heat of vaporization, enthalpy of vaporization. Latent heat is the amount of heat added to or removed from a substance to produce a change in phase. This energy breaks down the intermolecular attractive forces, and also must provide the energy necessary to expand the gas (the pΔV work). When latent heat is added, no temperature change occurs. The enthalpy of vaporization is a function of ... The 'enthalpy' of fusion is a latent heat, because during melting the heat energy needed to change the substance from solid to liquid at atmospheric pressure is latent heat of fusion, as the temperature remains constant during the process.Measuring the Latent Heat of Fusion The "calorimeter" is an insulated container which (hopefully) does not allow heat to enter or escape. It therefore allows us to measure the latent heat of ice by determining the amount of energy gained by ice when it is immersed in a bath of water. The heat gained by the ice will equal The 'enthalpy' of fusion is a latent heat, because during melting the heat energy needed to change the substance from solid to liquid at atmospheric pressure is latent heat of fusion, as the temperature remains constant during the process.The specific latent heat of fusion of ice = 3.34 x 105 J kg-1) Solution Example 3 Calculate the heat required to convert 4 kg of ice at - 15o C into steam at 100o C. ( Specific heat capacity of ice = 2.1 x 103J kg-1oC-1, Specific heat capacity of ice = 4.2 x 103J kg-1oC-1, Latent heat of fusion of ice = 3.34 x 105 J kg-1 and

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Compare the experimental value to the theoretical value for the latent heat of fusion of ice (L. f = 80 cal/g). If there is a discrepancy between the two, what can it be due to? 3. Discussion of the results of the experiment Latent heat, heat of fusion, heat of vaporization – problems and solutions. 1. Calculate the amount of heat added to 1 gram gold to change phase from solid to liquid. The heat of fusion for gold is 64.5 x 10 3 J/kg. Known : Mass (m) = 1 gram = 1 x 10-3 kg . Heat of fusion (L F) = 64.5 x 10 3 J/kg. Wanted : Heat (Q) Solution : Q = m L F The melting of a crystalline substance is a first-order transition, accompanied by an isothermal increase in enthalpy, the latent heat of fusion. Due to the impossibility of obtaining a pure crystalline phase in polymers, melting occurs over a range, and the enthalpy-temperature curve is S-shaped rather than discontinuous. What is Latent Heat, Examples, Latent Heat Equations, Units, A short and detailed summary of phase transitions, heat of fusion, vaporization, sublimation. Find this Pin and more on Physics by Howtrending.com .Latent heat of fusion or vaporization: Q= mol ∆H Q= kJ ∆H= change in heat mol= # moles Change in energy ∆H fus= 6.009kj/mol *(b-c) ∆H vap = 40.79kJ/mol) *(d-e) Examples: Find the amount of energy that would be required to melt 2.12 mole of solid water and turn it in-to a liquid The latent heat of melting is equivalent in magnitude to the latent heat of fusion, but opposite in sign. This phenomenon of latent heat is used in a variety of ways to heat and cool buildings. Using melting ice to absorb thermal energy from the surroundings saves some buildings thousands of dollars a year in cooling costs. The latent heat of fusion for water is 33.5 × 104 J/kg, while the latent heat of vaporization is 22.6 × 105 J/kg. What mass m of water at 0 °C must be frozen in order to release the amount of heat that 2.47 kg of steam at 100 °C releases when it

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Find the latent heat of fusion, Lf, according to Lf = q ÷ m by dividing the heat, q, absorbed by the ice, as determined in step 3, by the mass of ice, m Ice cubes. Paper towel. Calculator. Tips. If you need the latent heat of fusion in units other than joules per gram, such as calories per gram, use an online...Jan 27, 2006 · In the case where a solid changes into a liquid (melting) we refer to the latent heat of fusion, , which is defined as the amount of heat necessary to change one gram of a solid to a liquid without a temperature change. Note that latent heat of fusion literally means "hidden heat which causes melting". Specific latent heat of vaporisation of water = 2 260 000 J/kg. Energy required = 4 x 2 260 000 = 9 040 000 J. 2. Find the energy needed to change 500 g of ice at 0 o C to water at 0 o C. Specific latent heat of fusion of water = 334 000 J/kg. Energy required = 0.5 x 334 000 = 167 000 J. This specific heat calculator is a tool that determines the heat capacity of a heated or a cooled sample. Specific heat is the amount of thermal energy you need to supply to a sample weighing 1 kg to increase its temperature by 1 K. Read on to learn how to apply the heat capacity formula correctly to obtain a valid result.

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Energy = 835 000 000J Since it is a change of state between a solid and a liquid, you will need to use the latent heat of fusion. Latent heat of fusion = 334 000 J/Kg Step 2: Substitute the numbers into the equation Energy required = mass x specific latent heat 835 000 000 J = mass x 334 000 Latent Heat of Vaporization of Liquid Nitrogen A long lab report is due by Oct. 16th for Wednesday’s section, Oct. 17th for Thursday’s Introduction When material undergoes a phase change from one state (solid, liquid, or gas) to another, thermal energy is absorbed or released. This is called the latent heat of the phase change. The Heat of Fusion Formula Questions: 1. What is the heat of fusion for water if it takes 668 Joules of heat energy to melt 2.00 grams? Answer: 2. What mass of water can be melted at 0°C if 1500 J of heat energy is applied? Answer: The heat of fusion for water is applied here and the equation is rearranged to solve for mass.

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Jun 19, 2014 · From Table 2 we select the heat capacity value of 0.61 Btu/lb.-°F, and latent heat of fusion value of 89.1 Btu/lb, the processing temperature of 450°F, and again a room temperature of 80°F. The calculation method will be the same as for PS except we must include the latent heat with PP. Notice that the latent heat units are Btu/lb, thus the ... Nov 09, 2019 · Heat of fusion is the amount of energy in the form of heat needed to change the state of matter from a solid to a liquid (melting.) The formula to calculate heat of fusion is: q = m·ΔH f Note that the temperature does not actually change when matter changes state, so it's not in the equation or needed for the calculation.

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Sep 12, 2019 · Calculating the Latent Heats of Vaporization and Fusion of Water This application demonstrates how you can calculate the latent heat of vaporization and the latent heat of fusion of water. The application uses empirical data from the ThermophysicalData package Jan 02, 2018 · 3,027,000 J or 3,027 kJ I studied this in chemistry although your process may be different. Formulas used: q=(mass)(specific heat capacity)(Final temp-Initial temp) q=(mass)(latent heat) H=sum up the amounts of q *q represents heat and H represent enthalpy First, In order to find the total amount of heat we need to break it into steps , since water is in different states and temperatures. Latent heat is the heat per unit mass required for a phase change to occur. This topic will explain the Latent heat of fusion formula with examples. The formula for Latent heat of fusion: If m kg of the solid changes into the liquid at a constant temperature which is its melting point.Heat absorbed or released as the result of a phase change is called latent heat. There is no temperature change during a phase change, thus there is no change in the kinetic energy of Under extreme conditions of heat and exercise, an individual may sweat more than a liter of liquid per hour.Calculate the energy for each of the following. E = m × L. 5 kg of water is evaporated at 100°C. Latent heat of vaporisation of water = 2,260,000 J/kg. 1 kg of ice is melting at 0°C. Latent heat of fusion of water = 334,000 J/kg. The boiling point of oxygen is at -183°C. Calculate the energy needed for 50g of Oxygen to evaporate at its ...

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It is called latent because it is not associated with a change of temperature. For example, the latent heat of fusion, Lf, is given by Lf=DQ/m. The objective of this demonstration is to show how to determine the latent heat of fusion of ice by melting a known mass of ice in warm water. The materials that needed for this demonstration are as follow: Thus due to this temperature range, its high heat of fusion, stability in heat cycling and economic reasons the material selected for the thermal store was PW. PW have Melting temperature of the PCM 54.32 °C Latent heat of fusion 184.48 kJ/kg Density of the PCM (liquid phase) Density of the PCM 3 (solid phase ) 833.60 kg/m 3 HF = Heat of Fusion (Q = mHF) HV = Heat of Vaporization (Q=mHV) We use one of these two constants instead of specific heat and delta T Q = mCT Hf = Heat of Fusion is amount energy required to change 1 gram of pure substance from solid to liquid at its MP (meaning you aren’t changing the temperature) Is a physical constant Check out Reference Table B, what is the heat of fusion for water? The enthalpy of fusion of a substance, also known as (latent) heat of fusion is the change in its enthalpy resulting from providing energy, typically heat, to a specific quantity of the substance to change its state from a solid to a liquid, at constant pressure.Refer to the heating curve below: pay attention to the first plateau of the curve since the question is concerned only about the enthalpy change of fusion, which corresponds to the melting process. Plug in values and evaluate to find the latent heat of fusion, #L_F#, of the entire sample.