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Heat of Reaction

Δ H r of whic...

Question

$Δ H_{r}$ of which of the following reactions is zero?

H_{2} (g) ⟶ 2 H^{+} (g) + 2 e^{-}

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2 H (g) + a q ⟶ 2 H^{+} (a q) + 2 e^{-}

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2 H (g) ⟶ 2 H^{+} (g) + 2 e^{-}

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H_{2} (g) + a q ⟶ 2 H^{+} (a q) + 2 e^{-}

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Solution

The correct option is C $H_{2} (g) + a q ⟶ 2 H^{+} (a q) + 2 e^{-}$
As we know,
Solvation energy of hydrogen is zero so

$H_{2} (g) + a q ⟶ 2 H^{+} (a q) + 2 e^{-}$

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