Physics Practice Problems Heat Engines & PV Diagrams Practice Problems Solution: The figure below shows the PV cycle for a heat eng...

Solution: The figure below shows the PV cycle for a heat engine that uses 2 moles of a monoatomic gas. The initial temperature is Ta = 300 K. The engine runs through 3 process: an isotherm, an isobar, and an isochore.(a) Find explicit values of the gas variables P, V, and T at all 3 points on the diagram(b) Calculate ΔU, W, and Q for each leg of the cycle(c) What is the work done by the engine in one cycle?(d) What is the engine's thermal efficiency?

Problem

The figure below shows the PV cycle for a heat engine that uses 2 moles of a monoatomic gas. The initial temperature is Ta = 300 K. The engine runs through 3 process: an isotherm, an isobar, and an isochore.

(a) Find explicit values of the gas variables P, V, and T at all 3 points on the diagram

(b) Calculate ΔU, W, and Q for each leg of the cycle

(c) What is the work done by the engine in one cycle?

(d) What is the engine's thermal efficiency?