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## Dependence of entropy on pressure at constant temperature

The dependence of entropy temperature is simple known. It is heat capaity over temperautre. How about the dependence of entropy on pressure at constant temperature? At a first glace, it …

Mathematically

## Property relations : the Maxwell relations

Thermodynamic properties such as temperature, pressure, volume and entropy are related with each other. Their mutual relations are called property relations or Maxwell relations, and the equations showing property relations …

## Exercise : Calculation of H from G

Caculation of∆(G)

## G vs. H

In this video, we focus our attention to the relation between Gibbs free energy G and enthalpy. Gibbs free energy and enthalpy are closely related. If one has experimental data …

## Exercise : Temperature dependence of Gibbs Free Energy

Supercooled liquid water at – 50℃ will freeze adiabatically. ∆G, ∆S of this change? Final state might be a mixture of ice and liquid water. Liquid water and ice can …

## Thermodynamic potentials

Thermodynamic potential or fundamental function is a quantity used to represent the state of a system. We have four fundamental functions: internal energy U, enthalpy H, Helmholtz free energy F, …

## Different derivation of G and F

The physical meaning of free energy is highlighted in this video. The free energies are “free energy”. Thermodynamic free energy is the amount of work that a system can perform. …

## Free energy functions

We can determine the reversibility of the process by looking at the total entropy change. However, total entropy change is not the system property. We need information on the surrounding …