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Q.

Find the change in internal energy of the system when a system absorbs 2 kilocalorie of heat and at the same time does 500 joules of work

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a

7900 J

b

8200 J

c

5600 J

d

6500 J

answer is A.

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Detailed Solution

dQ= dU +dw or    dU=dQ−dW               =2×103×4⋅2 joule −500 joule =7900J
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Find the change in internal energy of the system when a system absorbs 2 kilocalorie of heat and at the same time does 500 joules of work