Determine the change in internal energy of as follows: a. The system had 30 cal exothermic reaction and 0.5 cal compression. b. The system had 20 cal endothermic reaction and 0.2 cal expansion. c. The system absorbed 20 cal heat and the volume became twice with 0.10 cal work d. The system released 15 cal heat and the volume became half with 0.15 cal work.
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