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Question: Answered & Verified by Expert
If a system absorbs $30 \mathrm{~kJ}$ of heat and perform $12 \mathrm{~kJ}$ of work on the surrounding. What is the increase in internal energy of the system?
ChemistryThermodynamics (C)MHT CETMHT CET 2022 (11 Aug Shift 1)
Options:
  • A 18 kJ
  • B 2.5 kJ
  • C 42 kJ
  • D 360 kJ
Solution:
1658 Upvotes Verified Answer
The correct answer is: 18 kJ
$\begin{aligned} & \triangle E=\delta Q+\delta W \\ & =30+(-12) \\ & =18 \mathrm{KJ}\end{aligned}$

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