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entropy


swaha

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calculate the final temperature attained by the 2 equal masses connected by a carnot engine whose initial temperatures were T & 4T(absolute temp.) and specific heat capacities of both masses are C.

pls tell me how to approach the sum. answer is 2T.

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For an infinitesimal time (dt) you can assume T is constant. If the efficiency were somehow 100%, all of the energy would be converted to work until the hot reservoir was as temperature T. Obviously that isn't the case, but if you can calculate an efficiency, you'll know how much the temperature decrease of the hot reservoir compares to the temp increase of the cold one, since they have equal masses and specific heat capacities. You should be able to calculate the incremental amount of energy added/lost in dt, and integrate to find the result.

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