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Work required for compression of a gas contained in a cylinder is 7000 kJ. During compression, heat interaction of 3000 kJ causes the surroundings to be heated. Internal energy change of the gas during the compression is __________ kJ. | |
A. | 4000 [Correct Answer] |
B. | -4000 [Wrong Answer] |
C. | 10000 [Wrong Answer] |
D. | -10000 [Wrong Answer] |