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Q.

One mole of gas absorbs 200J of heat at constant volume. Its temperature rises from 298K to 308K. the change in internal energy is

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a

200J

b

-200J

c

200×308298J

d

200×298308J

answer is A.

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Detailed Solution

According to First Law of ThermodynamicsΔU=Q+WBut at constant volume W = 0∴ΔU=Q=+200J
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One mole of gas absorbs 200J of heat at constant volume. Its temperature rises from 298K to 308K. the change in internal energy is