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jumoo32
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Can someone please guide me through these problems..
(1) An inventor claims to have constructed an engine that has an efficiency of 72.0% when operated between the boiling and freezing points of water. Calculate the difference between the percentage difference between the claimed efficiency and the actual efficiency. (ans: 45.2%)
(2) An ideal refrigerator, with coefficient of performance 4.3 extracts heat from the cold chamber at the rate of 258J/cycle.
(i) How much work per cycle is required to operate the refrigerator? (ans: 60.0 J)
(ii) How much heat is added to the room environment each cycle? (ans: 318.0 J)
(1) An inventor claims to have constructed an engine that has an efficiency of 72.0% when operated between the boiling and freezing points of water. Calculate the difference between the percentage difference between the claimed efficiency and the actual efficiency. (ans: 45.2%)
(2) An ideal refrigerator, with coefficient of performance 4.3 extracts heat from the cold chamber at the rate of 258J/cycle.
(i) How much work per cycle is required to operate the refrigerator? (ans: 60.0 J)
(ii) How much heat is added to the room environment each cycle? (ans: 318.0 J)