A heat engine with an efficiency of 30.0% performs 2500 J of work. How much heat is discharged to the lower temperature reservoir?

A) 5830 J
B) 8330 J
C) 750 J
D) 1350 J
E) 7080 J


Answer: A

Physics & Space Science

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A system has a heat source supplying heat to an ideal gas at a rate of 187.0 W and the gas is doing work at a rate of 130.9 W. At what rate is the internal (thermal) energy of the gas changing?

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A one-way mirror works because __________

Fill in the blank(s) with correct word

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During an isothermal process, 5.0 J of thermal energy via the process of heating is removed from an ideal gas. What is the work done on the gas in the process?

A) 0 J B) 5.0 J C) -5.0 J D) -10 J

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