Asked by amela

A Carnot engine operates between 170°C and 23°C. How much ice can the engine melt from its exhaust after it has done 4.5 104 J of work? _____kg
Answered by drwls
Use the upper and lower absolute temperatures to compute the Carnot engine efficiency.
Wout/Qin = 1 - (300/443) = 0.3228

Divide 45000 J by the efficiency for the heat energy input, Qin.
Qin = 139400 J

Qout = 139400 - 45000 = 94,400 J

Divide that by the heat of fusion of ice, 334 J/g, for the final answer, in grams. They may want you to convert to kilograms
Answered by amela
do i just divide it by a 1000 to convert. Because I am getting the wrong answer
Answered by amela
nevermind it is correct. Thank you very much.
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