FIGURE P21.57 shows the cycle for a heat engine that uses a gas having Ï’ = 1.25. The initial temperature is T₁= 300 K, and this engine operates at 20 cycles per second.
a. What is the power output of the engine?
b. What is the engine€™s thermal efficiency?

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p (atm) Pmax - 1 Isotherm EV (cm³) 600 0+ 400 200 FIGURE P21.57 2.