what efficiency of engine between 500k and 850k, if 1200 kcal of work is done by the engine then how much of heat is given to the sink?
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Explanation:
efficiency =1_t2/t1
efficiency =w/q
so
w/q=1_t2/t1
1200/q=1_500/850
1200/q=350/500
q=1200×500/350
q=12000/7
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