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Question
A gas contained in a cylinder is compressed, the work required for compression being 5000 kJ. During the process, heat interaction of 2000 kJ causes the surroundings to be heated. The changes in internal energy of the gas during the process is
A gas contained in a cylinder is compressed, the work required for compression being 5000 kJ. During the process, heat interaction of 2000 kJ causes the surroundings to be heated. The changes in internal energy of the gas during the process is
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Solution
The correct option is C +3000 kJ
(c)
Given data: Work done on gas in cylinder during compression,
W=−5000kJ
Heat, Q=−2000kJ
According to first flow for process,
Q=dU+W
−2000=dU−5000
or dU=−2000+5000=+3000kJ
(c)
Given data: Work done on gas in cylinder during compression,
W=−5000kJ
Heat, Q=−2000kJ
According to first flow for process,
Q=dU+W
−2000=dU−5000
or dU=−2000+5000=+3000kJ
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