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Statement of a problem № 2741

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In each of the following situations, find the change in internal energy of the system. (a) A system absorbs 500 cal of heat and at the same time does 400 J of work. (b) A system absorbs 300 cal and at the same time 420 J of work is done on it. (c) Twelve hundred calories is removed from a gas held at constant volume. Give your answers in kilojoules.

Solution:
In each of the following situations, find the change in internal energy of the s

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