PHASE DIAGRAM EXPLORER

This is a teaching tool meant to semi-quantitatively illustrate key concepts in the classical thermodynamics of binary systems.
It is not designed with the accuracy needed for use in research.

Choose a set of values to start from:

Standard enthalpy and entropy for pure components

Component 1

Standard enthalpy of formation ΔH_298K⁰(J/mol)Standard entropy S_298K⁰(J/mol∙K)

Standard enthalpy of formation ΔH_298K⁰(J/mol)

Standard entropy S_298K⁰(J/mol∙K)

Component 2

Standard enthalpy of formation ΔH_298K⁰(J/mol)Standard entropy S_298K⁰(J/mol∙K)

Standard enthalpy of formation ΔH_298K⁰(J/mol)

Standard entropy S_298K⁰(J/mol∙K)

Heat Capacity

Component 1: C_p (J/mol∙K) = a + b∙T + c∙T^-2

Alpha Phase (α)
C_p (J/mol∙K) =
0 + 0T + 0T^-2

a (J/mol∙K)b (J/mol∙K²)c (J∙K/mol)

a (J/mol∙K)

b (J/mol∙K²)

c (J∙K/mol)

Beta Phase (β)
C_p (J/mol∙K) =
0 + 0T + 0T^-2

a (J/mol∙K)b (J/mol∙K²)c (J∙K/mol)

a (J/mol∙K)

b (J/mol∙K²)

c (J∙K/mol)

Liquid Phase (L)
C_p (J/mol∙K) =
0 + 0T + 0T^-2

a (J/mol∙K)b (J/mol∙K²)c (J∙K/mol)

a (J/mol∙K)

b (J/mol∙K²)

c (J∙K/mol)

Component 2: C_p (J/mol∙K) = a + b∙T + c∙T^-2

Alpha Phase (α)
C_p (J/mol∙K) =
0 + 0T + 0T^-2

a (J/mol∙K)b (J/mol∙K²)c (J∙K/mol)

a (J/mol∙K)

b (J/mol∙K²)

c (J∙K/mol)

Beta Phase (β)
C_p (J/mol∙K) =
0 + 0T + 0T^-2

a (J/mol∙K)b (J/mol∙K²)c (J∙K/mol)

a (J/mol∙K)

b (J/mol∙K²)

c (J∙K/mol)

Liquid Phase (L)
C_p (J/mol∙K) =
0 + 0T + 0T^-2

a (J/mol∙K)b (J/mol∙K²)c (J∙K/mol)

a (J/mol∙K)

b (J/mol∙K²)

c (J∙K/mol)

Phase change properties

Component 1

α → β

ΔH (J/mol)ΔS (J/mol∙K)T (K)

ΔH (J/mol)

ΔS (J/mol∙K)

T (K)

β → L

ΔH (J/mol)ΔS (J/mol∙K)T (K)

ΔH (J/mol)

ΔS (J/mol∙K)

T (K)

Component 2

α → β

ΔH (J/mol)ΔS (J/mol∙K)T (K)

ΔH (J/mol)

ΔS (J/mol∙K)

T (K)

β → L

ΔH (J/mol)ΔS (J/mol∙K)T (K)

ΔH (J/mol)

ΔS (J/mol∙K)

T (K)

Solution Models

a^_

a^α (J/mol)a^β (J/mol)a^L (J/mol)

a^α (J/mol)

a^β (J/mol)

a^L (J/mol)

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