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jennylove:
Making a heat engine that uses its exhaust heat to do work is restricted according to which principle? second law of thermodynamics conservation of matter first law of thermodynamics conservation of energy i think its A
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imqwerty:
Why do you think that it's A?
jennylove:
im honestly not sure, i just guessed
jennylove:
the second law however does state that processes that involve the transfer or conversion of heat energy are irreversible
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