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Thermodynamics question

2006 · Q118
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Thermodynamics question

2006 · Q118

NEETChemistryThermodynamicsMCQ+4 / −1
Assume each reaction is carried out in an open container. For which reaction will Δ\DeltaΔH = Δ\DeltaΔE ?
  1. A
    2CO(g) + O2(g) →\to→  2CO2(g)
  2. B
    H2(g) + Br2(g) →\to→ 2HBr(g)
  3. C
    C(s) + 2H2O(g) →\to→ 2H2(g) + CO2(g)
  4. D
    PCl5(g) →\to→ PCl3(g) + Cl2(g)
View written solutionFree

Correct answer: B

We know that

Δ\Delta ΔH = Δ\Delta ΔE + Δ\Delta ΔngRT

In the reaction, H2(g) + Br2(g) →\to→ 2HBr(g)

Δ\Delta Δng = 2 - (1 + 1) = 0

So, Δ\Delta ΔH = Δ\Delta ΔE for this reaction.

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