Calculate the change in internal energy of the following, Chemistry

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Calculate the change in internal energy of the following

Problem- Calculate the change in internal energy of the following system: a balloon is cooled by removing 0.659kJ of heat. It shrinks on cooling, and the atmosphere does 389Jof work on the balloon.

Calculate the change in internal energy of the following system: 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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Chemistry: Calculate the change in internal energy of the following

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