5.26 For the following processes, calculate the change in internal energy of the system and determine whether the process is

Question

5.26 For the following processes, calculate the change in internal energy of the system and
determine whether the process is endothermic or exothermic:
(a) A balloon is cooled by removing 0.655 kJ of heat. It shrinks on cooling, and the
atmosphere does 382 J of work on the balloon.
(b) A 100.0-g bar of gold is heated from 25 °C to 50 °C during which it absorbs 322 J of
heat. Assume the volume of the gold bar remains constant.

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