A) 10 J
B) 70 J
C) 84 J
D) 134 J
Correct Answer: A
Solution :
Since, work is done by the system, so it is positive. Therefore, \[\Delta W=30\,J\] Heat given to the system, \[\Delta Q=40\,J\] According to first law of thermodynamics, change in internal energy is given by \[\Delta U=\Delta Q-\Delta W\] = 40 - 30 = 10 JYou need to login to perform this action.
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