Entropy Change in Irreversible Mixing · IPhO 2010 #2

Physics · second-law-entropy

Problem

Two identical insulated containers each hold

n = 1.0\;\text{mol}

of an ideal monatomic gas. Container A is at

T_A = 600\;\text{K}

and container B at

T_B = 300\;\text{K}

. They are connected and allowed to reach thermal equilibrium. Find the entropy change of the universe.