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The temperature T1 and T2 of the two heat reservoirs in an ideal carnot engine be 1500ºC and 500ºC respectively.

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The temperature T1 and T2 of the two heat reservoirs in an ideal carnot engine be 1500ºC and 500ºC respectively. Which of these increasing T1 by 100ºC or decreasing T2 by 100ºC would result in a greater improvement in the efficiency of the engine.

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(i) T1 is increased from 1500ºC to 1600ºC 

 T1 = 1873 k T2 

Remain constant T2 = 773 k

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