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Thermodynamics question

2003 · Q113
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Thermodynamics question

2003 · Q113

NEETChemistryThermodynamicsMCQ+4 / −1
For the reaction,
C3H8(g) + 5O2(g) →\to→ 3CO2(g) + 4H2O(l)
at constant temperature, Δ\DeltaΔH −-− Δ\DeltaΔE is
  1. A
    + RT
  2. B
    −-−3RT
  3. C
    + 3RT
  4. D
    −-− RT
View written solutionFree

Correct answer: B

Δ\Delta ΔH = Δ\Delta ΔE + Δ\Delta Δng RT

Δ\Delta Δng = 3 – (1 + 5) = – 3

⇒\Rightarrow⇒ Δ\Delta ΔH = Δ\Delta ΔE + (– 3RT)

⇒\Rightarrow⇒ Δ\Delta ΔH – Δ\Delta ΔE = – 3RT

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