A) 7900 J
B) 8200 J
C) 5600 J
D) 6400 J
Correct Answer: A
Solution :
\[\Delta Q=2k\,cal=2\times {{10}^{3}}\times 4.2J\]\[=8400J\]and \[\Delta W=500J.\] Hence from \[\Delta Q=\Delta U+\Delta W,\] \[\Delta W=\Delta Q-\Delta U\] = 8400 ? 500 = 7900 JYou need to login to perform this action.
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