What is change in internal energy of the system when work done by the system is 150 J and system release 300…

What is change in internal energy of the system when work done by the system is 150 J and system release 300 J of heat?
  1. +450 J
  2. -450 J
  3. +300 J
  4. -150 J

Solution

According to the first law of thermodynamics, $\Delta \mathrm{U}=\mathrm{Q}+\mathrm{W}=-300 \mathrm{~J}-150 \mathrm{~J}=-450 \mathrm{~J}$.

Asked in: MHT CET 2024 (09 May Shift 1)

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