A) -20 J
B) 20 J
C) 80 J
D) 3 J
Correct Answer: B
Solution :
Here: \[dQ=-30\,J\] (negative sign appears as the heat is going out from the system) \[dW=-10\,J,\,U,=40\,J\] Using the relation \[dQ=dU+dW\] \[-30=({{U}_{f}}-40)+(-10)\] \[{{U}_{f}}=20\,J\]You need to login to perform this action.
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