LECTURE PHYSICAL CHEMISTRY 3rd EDITION ROBERT G. MORTIMER

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The efficiency, η Carnot , of the Carnot engine is the
work done on the surroundings divided by the heat
input from the hot reservoir. The heat exhausted at
the cold reservoir is wasted and is not included in
the efficiency calculation.
We have shown that the efficiency of a reversible
heat engine operating with two heat reservoirs does
not depend on the nature of the working fluid or on
the details of its design, but depends only on the
temperatures of the heat reservoirs.
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