A certain amount of ideal monatomic gas is maintained at constant volume as it is cooled from 455K to 405 K. This feat is accomplished by removing 400 J of heat from the gas. How much work is done by the gas during this process? The ideal gas constant is R = 8.314 J/mol • K.

Explanation:

The work done by the gas is defined as:

Where P is the presion and is the volume change. Since the gas is maintained at constant volume, we have . So:

So, the heat is equal to the change in the internal energy of the gas.

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