A) Increases by 600 J
B) Decreases by 800 J
C) Increases by 800 J
D) Decreases by 50 J
Correct Answer: C
Solution :
\[\Delta Q=\Delta U+\Delta W\] \[\because \,\,\,\Delta Q = 200 cal = 200 \times 4.2=840 J and\,\,\Delta W=40 J\]\[\Rightarrow \,\,\,\,\Delta U=\Delta Q-\Delta W=840-40=800\,J\]You need to login to perform this action.
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