The efficiency of a particular car engine is 25% when the engine does 8.2 kJ of work per cycle. Assume the process is reversible. What are (a) the energy the engine gains per cycle as heat Qgain from the fuel combustion and (b) the energy the engine loses per cycle as heat Qlost? If a tune-up increases the efficiency to 31%, what are (c)Qgain and (d) Qlost at the same work value?

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The efficiency of a particular car engine is 25% when the engine
does 8.2 kJ of work per cycle. Assume the process is reversible.
What are (a) the energy the engine gains per cycle as heat Qgain
from the fuel combustion and (b) the energy the engine loses per
cycle as heat Qlost? If a tune-up increases the efficiency to 31%,
what are (c)Qgain and (d) Qlost at the same work value?

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