A) \[\Delta E=Q-W\]
B) \[\Delta E=Q+W\]
C) \[W=Q+\Delta E\]
D) \[Q=W+\Delta E\]
Correct Answer: B
Solution :
According to first law of thermodynamics "Energy can neither be created nor be destroyed, it can only be converted from one form to another" Mathematically \[\Delta E\]or \[\Delta U=q+W\] \[\Delta U=\]change in internal energy q = heat absorbed W = work done NOTE : Heat absorbed by the system \[\to q=+ve\] Heat given out by the system \[\to q=-ve\] Work done on the system \[\to W=+ve\] Word done by the system \[W=-ve\]
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