May 2011
Beginner
492 pages
14h 16m
English
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Problems
- Calculate the efficiency of Carnot's engine working between 100 °C and 0 °C.
Ans. 26.8%
- A Carnot's engine is operated in the reverse direction as a refrigerator between 300 K and 450 K. If it receives 1000 calories of heat from the reservoir at 300 K, what is the amount of heat delivered at 450 K.
Ans.1500 calories
- A Carnot's engine has a low temperature reservoir at 7 °C with efficiency of 40%. It is desired to increase the efficiency to 50%. By how many degrees should the temperature of the high temperature reservoir be increased?
Ans. 93.3 °C
- An engine works in a Carnot's cycle between 27 °C and 127 °C and the work output per cycle is 300 kgm-meters. Calculate the heat supplied to the engine from the source.
Ans. 2803 calories ...
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