Heats of Fusion and Vapourisation

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    Heats of Fusion

    Normal Melting Point Heat of Fusion, L f

    Substance K C (J/kg)

    Helium * * *

    Hydrogen 13.84 259.31 58.6103

    Nitrogen 63.18 209.97 25.5103

    Oxygen 54.36 218.79 13.8103

    Ethanol 159 114 104.2103

    Mercury 234 39 11.8103

    Water 273.15 0.00 334103

    Sulfur 392 119 38.1103

    Lead 600.5 327.3 24.5103

    Antimony 903.65 630.50 165103

    Silver 1233.95 960.80 88.3103

    Gold 1336.15 1063.00 64.5103

    Copper 1356 1083 134103

    *A pressure in excess of 25 atmospheres is required to make helium solidify. At 1 atmosphere pressure, helium

    remains a liquid down to absolute zero.

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    Heats of Vaporization

    Normal Boiling Point Heat of Vaporization, L v

    Substance K C (J/kg)

    Helium 4.216 268.93 20.9103

    Hydrogen 20.26 252.89 452103

    Nitrogen 77.34 195.8 201103

    Oxygen 90.18 183.0 213103

    Ethanol 351 78 854103

    Mercury 630 357 272103

    Water 373.15 100.00 2256103

    Sulfur 717.75 444.60 326103

    Lead 2023 1750 871103

    Antimony 1713 1440 561103

    Silver 2466 2193 2336103

    Gold 2933 2660 1578103

    Copper 1460 1187 5069103

    Young, Hugh D., and Roger A. Freedman. University Physics with ModernPhysics. 12th Edition. San Francisco: Pearson Addision-Wesley, 2008.


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