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Answered

Which of the following changes would make a heat engine less efficient?

AA decrease in its exhaust temperature
BA decrease in entropy
CAn increase in work done
DA decrease in its operating temperature

Verified Answer :

lr1265

A decrease in it's operating temperature would make a heat engine less efficient. This is because in order to operate, a heat engine needs to be hot and maintain that temperature.

scme1702

D
A decrease in operation temperature will decrease the temperature difference and reduce efficiency.