题目如下
A reversible heat engine, operating in a cycle, withdraws heat
from a high-temperature reservoir(the temperature of which
consequently decreases), performs work w, and rejects heat into
a low-temperature reservoir(the temperature of which consequently
increases). The two reservoirs are, initially, at the temperature
T1 and T2 and have constant heat capacities C1 and C2, respectively.
Calculate the final temperature of the system and the maximum amount
of work which can be obtained from the engine.
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