While its temperature remains constant at 80 degrees F, 2.5lb of a certain gas, whose cp=0.28 and cv=0.2Btu/lb-degreeR, rejects 300 Btu; p1=85psi. Determine (a) V1, V2, p2.
Once you know the V1=6.9ft^3; then you need to set the work done:
Your work done, W ...
Answer includes formulas and steps but does not include a worked out solution.