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a heat engine converts 100.0 cal from a supply of 400.0 cal into work. how much mechanical work...

a heat engine converts 100.0 cal from a supply of 400.0 cal into work. how much mechanical work was done?

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Answer #1
Qh=400 cal=.40 kcal
Ql=100 cal=.10 kcal
W=J(Qh-Ql)
W=4184 J/kcal(.3 kcal)
W=1255.2 J
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