Two identical vessels A and B contain equal amount of ideal monoatomic gas. The piston of A is fixed but that of B is free. Same amount of heat is absorbed by A and B. If B's internal energy increases by 100 J the change in internal energy of A is :-

Question

G1 Physics · Accepted Answer

The same heat Q is supplied to both vessels. Vessel B is heated at constant pressure, so its internal-energy increase is 100 J and Q=(5/3)×100=500/3 J. Vessel A is rigid, so W=0 and its internal-energy increase equals Q=500/3 J. Option B.