Question

Problem 2. As shown in the figure, a gas contained within a piston-cylinder assembly, initially at a volume of 0.1 m3, undergoes a constant-pressure expansion at 2 bar to a final volume of 0.12 m3, while being slowly heated through the base. The change in internal energy of the gas is 0.25 kJ. The piston and cylinder walls are fabricated fronm heat-resistant material, and the piston moves smoothly in the cylinder. The local atmospheric pressure is 1 bar. (a) For the gas as the system, evaluate work each in kJ. (b) For the gas as the system, evaluate work and heat transfer, each in kJ. (c) For the piston as the system, evaluate work and change in potential energy, each in kJ. Piston Patm 1 bar p-2 bar V-0.1 m3 2 0.12 m3 U2-01)-0.25 kJ Gas 0

Answer 1