You have a sample of perfect gas in a cylinder separated by africtionless adiaba

Question

You have a sample of perfect gas in a cylinder separated by africtionless adiabatic piston into two sections (A and B). Section B is in a waterbath that keeps its temperature constant. Initially TA = TB = 300K, VA = VB = 2 L and nA = nB= 2 mol. Heat is supplied to section A and the piston moves to the right reversiblyuntil the final volume of section B is 1L. Calculate (a) work done by the gas in section A. (b)U for the gas in section B. (c) q for the gas in B (d) U for the gas in A and (e) qfor the gas in A. Assume CV,m = 20 JK-1mol-1 You have a sample of perfect gas in a cylinder separated by africtionless adiabatic piston into two sections (A and B). Section B is in a waterbath that keeps its temperature constant. Initially TA = TB = 300K, VA = VB = 2 L and nA = nB= 2 mol. Heat is supplied to section A and the piston moves to the right reversiblyuntil the final volume of section B is 1L. Calculate (a) work done by the gas in section A. (b)U for the gas in section B. (c) q for the gas in B (d) U for the gas in A and (e) qfor the gas in A. Assume CV,m = 20 JK-1mol-1

Explanation / Answer

I'm confused, if section B is in a water bath keeping it's temp constant, wouldn't it be isothermal and therefore deltaU would be zero?

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