Thermodynamic Equilibrium

6 important questions on Thermodynamic Equilibrium

What is Gibbs' phase rule?


nDOF is the number of degrees of freedom
C is the number of components
nphase is the number of phases

What is the Clapeyron equation and when is it applicable?

The Clapeyron equation is a description of the phase boundary.

How is the Clapeyron equation derived from the properties of the phase boundary?

Using the equality of the chemical potentials:
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What is the Clausius-Clapeyron equation?

with kB the Boltzman constant.

What assumpsions are used to derive the Clausius-Clapeyron from the Clapeyron equation?

1. The molar volume of the gas phase is much larger that either the liquid or the solid molar volume.
2. The enthalpy is assumed independent of temperature.
3. The ideal gas laws can be applied.

What is the Antoine equation?


The Antoine equation is an empirically fitted equation to predict the saturation pressure.

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