A) \[-20J\]
B) \[20J\]
C) \[80J\]
D) \[3J\]
Correct Answer: B
Solution :
Here: \[dQ=-30J\] (negative sign appears as the heat is going out of the system) \[dW=-10J,\,{{U}_{i}}=40\,J\] 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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