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