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Question: Answered & Verified by Expert
Calculate the change in enthalpy in a chemical reaction when work done is $-800 \mathrm{~J}$ and increase in internal energy is $600 \mathrm{~J}$.
ChemistryThermodynamics (C)MHT CETMHT CET 2022 (08 Aug Shift 2)
Options:
  • A -1400 J
  • B -240 J
  • C -200 J
  • D -680 J
Solution:
2974 Upvotes Verified Answer
The correct answer is: -200 J
$\begin{aligned} & \triangle H=\Delta U+P d V \\ & =600-800 \\ & =-200 \mathrm{~J}\end{aligned}$

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