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The internal energy change in a system t...

The internal energy change in a system that has absorbed `2 kcal` of heat and done `500J` of work is

A

8900 J

B

6400 J

C

5400 J

D

7900 J

Text Solution

Verified by Experts

The correct Answer is:
D
`DeltaQ = DeltaU + Delta W rArr 2 xx 10^(3) xx 4.2 = DeltaU + 500 rArr DeltaU = 7900 J`
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