A) increases by 600 J
B) decreases by 800 J
C) increases by 800 J
D) decreases by 50 J
Correct Answer: C
Solution :
\[dQ=+\,200\,cal\] \[=200\times 4.2=840\,J\] \[dW=+\,40\,J\] From the first law of thermodynamics \[dQ=dU+dW\] \[dU=dQ-dW\] \[=840-40=800\,J\] So, the internal energy of the .system increased by 800 J.You need to login to perform this action.
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