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# Metals - Latent Heat of Fusion

## Metals and their latent heat of fusion

The Latent Heat of Fusion is the heat supplied to a solid body at the melting point when it changes state from solid to liquid.

Latent heat of fusion for some metals are indicated below:

MetalSymbolAtomic Weight
(g/mol)
Latent Heat of Fusion
(kJ/mol)(kJ/kg)

Aluminum Al 27 10.7 396
Antimony Sb 122 19.7 161
Beryllium Be 9.1 7.95 1356
Bismuth Bi 209 10.9 52.2
Chromium Cr 52.0 20.5 394
Cobalt Co 58.9 16.2 275
Copper Cu 63.5 13.1 206
Gold Au 197 12.5 63
Iridium Ir 192 26 135
Iron Fe 55.8 13.8 247
Magnesium Mg 24.3 8.7 358
Manganese Mn 54.9 13.2 240
Mercury Hg 201 2.29 11.4
Molybdenum Mo 95.9 36 375
Nickel Ni 58.7 17.2 293
Niobium Nb 92.9 26.8 288
Osmium Os 190 31 163
Platinum Pt 195 20 103
Plutonium Pu 244
Potassium K 39.1 2.33 56
Rhodium Rh 103 21.7 211
Selenium Se 79 5.4 68
Silicon Si 28.1 50.2 1787
Silver Ag 108 11.3 105
Sodium Na 23 2.6 113
Tantalum Ta 271 36 199
Thorium Th 232 16 69
Tin Sn 119 7 59
Titanium Ti 47.9 18.7 390
Tungsten W 184 35 190
Uranium U 238 14 59
Zinc Zn 65.4 7.35 112
• 1 kJ/kg = 0.23884 cal/g = 0.23884 kcal/kg = 0.4299 Btu/lbm

Latent heat of fusion is calculated as

L = 1000 Lmol / A      (1)

where

L = latent heat of fusion (kJ/kg)

Lmol = latent heat of fusion (kJ/mol)

A = atomic weight (g/mol)

Note that atomic mass and atomic weight are two different things. Atomic mass is the mass of an individual element. Atomic weight is the average mass of all the isotopes of an element. Force is not involved.

## Related Topics

• Material Properties - Material properties for gases, fluids and solids - densities, specific heats, viscosities and more

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## Citation

• Engineering ToolBox, (2008). Metals - Latent Heat of Fusion. [online] Available at: https://www.engineeringtoolbox.com/fusion-heat-metals-d_1266.html [Accessed Day Mo. Year].

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