Page 377 - Handbook of Thermodynamic Diagrams 3 : Organic Compounds C8 to C28

Appendix A

Equations for Thermodynamic Properties

Enthalpy

Internal Energy

U = H - PV (3)

Helmholtz Energy

A = U - T S (4)

Gibbs Energy

G = H - TS (5)

Parameters

C p = heat capacity of ideal gas (6)

H ref , S ref = reference state for ideal gas (7)

T ref ,P re f = reference temperature , reference pressure (8)

DH resid , DS resid = residual enthalpy , residual entropy (9)

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