Answer to Question #169523 in Molecular Physics | Thermodynamics for Khushi

Question

Two separate containers are filled with different gases. If these gases are

allowed to mix, obtain an expression for entropy of mixing per mole of the

mixture.

Answer 1

If n(gas A)=n(gas B), T(gas A)=T(gas B), then

$\Delta S = S_1-S_2=2nRln2$