Latent Heat of Melting common Materials
The latent heat of fusion of a substance is
- the amount of heat required to convert a unit mass of the solid into liquid without change in temperature
The latent heat of melting for some common solids are indicated below:
| Product | Latent Heat of Melting |
|---|---|
| (kJ/kg) | |
| Acetic acid | 181 |
| Acetone | 98.3 |
| Alcohol, ethyl (ethanol) | 108 |
| Alcohol, methyl (methanol) | 98.8 |
| Alcohol, propyl | 86.5 |
| Aluminum | 396 |
| Ammonia | 339 |
| Aniline | 113.5 |
| Antimony | 161 |
| Benzene | 126 |
| Bismuth | 52.2 |
| Brass | 168 |
| Bromine | 66.7 |
| Cadmium | 56 |
| Carbon disulfide | 57.6 |
| Carbon dioxide | 184 |
| Carbon tetrachloride | 174 |
| Cast iron | 126 |
| Chloroform | 77 |
| Chromium | 394 |
| Cobalt | 275 |
| Copper | 206 |
| Decane | 201 |
| Dodecane | 216 |
| Ether | 96.2 |
| Ethyl ether | 113 |
| Ethylene glycol | 181 |
| Glycerine | 200 |
| Gold | 63 |
| Heptane | 140 |
| Hexane | 152 |
| Ice, see Water | |
| Iodine | 62.2 |
| Iron, gray cast | 96 |
| Iron, white cast | 138 |
| Iron, slag | 209 |
| Lead | 23 |
| Manganese | 240 |
| Mercury | 11.4 |
| Naphthaline | 151 |
| Nickel | 293 |
| Octane | 181 |
| Paraffin | 147 |
| Phenol | 121 |
| Phosphrus | 21.1 |
| Platinium | 103 |
| Potassium | 59 |
| Propane | 79.9 |
| Propylene | 71.4 |
| Silver | 105 |
| Sulphur | 39.2 |
| Tin | 59 |
| Toluene | 71.8 |
| Water, Ice | 334 |
| Wood's alloy | 33.5 |
| Zinc | 112 |
- 1 kJ/kg = 0.4299 Btu/lbm = 0.23884 kcal/kg
Heat Required to Melt a Solid
The heat required to melt a solid can be calculated as
q = Lm m (1)
where
q = required heat (J, Btu)
Lm = latent heat of melting (J/kg, Btu/lb)
m = mass of substance (kg, lb)
Example - Required Heat to melt Ice to Water
The heat required to melt 10 kg of ice to water can be calculated as
q = Lm m
= 334 103 (J/kg) 10 (kg)
= 3340000 (J)
= 3340 (kJ)
Related Topics
• Material Properties
Material properties of gases, fluids and solids - densities, specific heats, viscosities and more.
• Melting and Freezing Points
Melting and freezing points of elements and chemical species at varying conditions.
• Thermodynamics
Work, heat and energy systems.
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