Shown above is the p-V diagram of a 3-stage heat engine. The engine starts at po

Question

Shown above is the p-V diagram of a 3-stage heat engine. The engine starts at point A, then to B, and C, and then back to A completing a cycle. In the diagram, the pressure is measured in unit of kPa and the volume in mL unit.

(a) How much work does the engine do in one cycle? Pay attention to the units as usual.
J


(b) If the engine goes through the cycle 156 times in one second, what is the output power of the engine?
W

(c) Choose all that are correct from the following.

Shown above is the p-V diagram of a 3-stage heat engine. The engine starts at point A, then to B, and C, and then back to A completing a cycle. In the diagram, the pressure is measured in unit of kPa and the volume in mL unit. How much work does the engine do in one cycle? Pay attention to the units as usual. J If the engine goes through the cycle 156 times in one second, what is the output power of the engine? W Choose all that are correct from the following. All the processes, A to B, B to C, C to A are adiabatic. All the processes, A to B, B to C, and C to A are isobaric. The process from point C to A is isobaric. The process A to B is isobaric. The process B to C is adiabatic.

Explanation / Answer

1)Area under PV graph --- 1J

2) Power = w/t = 1x 156 = 156 W

3)zprocess from C to A is adiabatic

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