The efficiency of a Carnot cycle is . If on reducing the temperature of the sink by 65°C, the efficiencybecomes , determine the initial and final temperatures 3 between which the cycle is working.

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Efficiency of a Carnot cycle,=1-(Tsink/Tsource) If eff =1/6 then Tsink/Tsource= 5/6 ------(1) If eff = 1/3 the Tsink-65/Tsource= 2/3------(2) Solving the equation 1 and 2 T sink = 325( lower temp) T source = 390( higher temperature)
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