MCQ
For which of the following reaction, ΔH = ΔU?
  • A
    $\ce{H2O_{(l)} ->[\Delta] H2O_{2(g)}}$
  • B
    $\ce{PCl_{5(g)} ->[\Delta] PCl_{3(g)} + Cl_{2(g)}}$
  • $\ce{H_{2(g)} + Br_{2(g)} -> 2 HBr_{(g)}}$
  • D
    $\ce{2CO_{(g)} + O_{2(g)} -> 2 CO_{2(g)}}$

Answer

Correct option: C.
$\ce{H_{2(g)} + Br_{2(g)} -> 2 HBr_{(g)}}$
C

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