ENTHALPY_FUSION
ENTHALPY_FUSION [kJ/kg, kJ/kmol, J/kg, J/kmol, Btu/lbm Btu/lbmol] returns the difference between the specific enthalpy of the liquid and solid phases at the normal melting temperature, i.e., the temperature on the solid-liquid phase boundary corresponding to atmospheric pressure. If the triple-point pressure is above atmospheric pressure, as it is for carbon dioxide, the enthalpy change of fusion corresponds to the triple-point temperature rather than the normal melting point. The normal melting temperature is not provided as an EES function, but the effect of pressure on the melting temperature is small so that the temperature returned by the T_triple property function provides a good estimate of the melting temperature.
The ENTHALPY_FUSION function requires only one argument and that is the name of the substance.
The enthalpy change of fusion data are from:
Lide, D.R, and Kehiaian, H.V., "CRC Handbook of Thermophysical and Thermochemical Data", CRC Press ISBN 0-8493-0197-1, (1994)
and
https://webbook.nist.gov/chemistry/
Examples
$UnitSystem SI C kPa mass
$Load Incompressible
DELTAh_1=enthalpy_fusion(Nitrogen)
DELTAh_2=enthalpy_fusion(Cyclopentane)
{Solution:
DELTAh_1=25.35 [kJ/kg]
DELTAh_2=8.667 [kJ/kg]
}