In the regular solution, the enthalpy of mixing ΔH is dependent on mole fractions of the components of the binary mixture:

ΔH=w*x_{1}*x_{2}

The entropy of mixing ΔS is the ideal entropy of mixing.

The Gibbs energy of mixing is:

ΔG=ΔH-TΔS

The plot shows the enthalpy, the entropy and the Gibbs energy of the regular solution.

w, kJ/mol: T, K:

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(C) V.Kocherbitov, 2015