Question

A thermodynamic system goes from states (i) P1, V to 2P1, V (ii) P, V1 to P, 2V1. Then work done in the two cases is

• A. Zero, Zero
• B. Zero, – PV1
• C. – PV1, Zero
• D. –PV1, –P1V1

Answer 1

Answer: (B)

Zero, – PV1

Answer 2

case (i) $\Delta$V = 0, W = 0

case (ii) P = constant, W = – P(2V1 –V1) = – PV1