The figure shows a PV diagram for an engine that uses a monatomic ideal gas as the working substance. The temperature at point A is 470.0 K. (a) How much net work does this engine do per cycle? (b) Assuming that the efficiency of the engine is 0.444, what is the heat input into the gas per cycle? (c) How much heat is exhausted per cycle? (d) How many moles of gas are used in this engine? (e) What is the total change in internal energy of this gas in one cycle?

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A: Step 1:         Thus the value of work  = 1.239 kJ Step 2: Step 3: Step 4: