Vol 5 - Landau Lifshitz Statistical Physics · Problem 42.2

Ideal Gases

Physics — Landau & Lifshitz · entropy-change-connecting-vessels

Problem

Two vessels contain two identical ideal gases at the same temperature

T

and with equal numbers of particles

N

but at different pressures

P_1

and

P_2

. The vessels are then connected. Find the change in entropy.