(III) A Carnot cycle, shown in Fig. 20-7, has the following conditions: Va = 7.5L, Vb = 15.0L, TH = 470°C, and TL = 260ºC. The gas used in the cycle is 0.50 mol of a diatomic gas, γ = 1.4. Calculate (a) the pressures at a and b; (b) the volumes at c and d. (c) What is the work done along process ab? (d) What is the heat lost along process cd? (e) Calculate the net work done for the whole cycle. (f) What is the efficiency of the cycle, using the definition e W/QH? I Show that this is the same as given by Eq. 20-3.
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