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Hydrogen Peroxide

Following are...

Question

Following are the values of the Electron gain enthalpy (in kJ mol $^{- 1}$ ) of the formation of $O^{-}$ and $O^{2 -}$ from $O$ :

- 142, - 744

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- 142, 744

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142, 744

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- 142, - 142

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Solution

The correct option is B $- 142, 744$
The values of the Electron gain enthalpy (in kJ mol $^{- 1}$ ) of the formation of $O^{-}$ and $O^{2 -}$ from $O$ are $- 142, 744$ .

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Similar questions

(O^{2 -} (g))

O + e^{-} \to O^{-}_{(g)} + 142 k J m o l^{- 1}

O^{-} + e^{-} \to O^{- 2}_{(g)} - 844 k J m o l^{- 1}

k J m o l^{- 1}

O^{-}

O^{2 -}

O

- 233 k J / m o l

C s = + 78 k J / m o l

C s = + 375 k J / m o l

O_{2} (g) = 494 k J / m o l

O_{2}

O = - 141 k J / m o l

O = + 845 k J / m o l

O^{-}

Δ H

H_{2} (g) + O_{2} (g) ⟶ H_{2} O_{2} (g)

H - H

436 k J

{m o l}^{- 1}

O - O

142 k J

{m o l}^{- 1}

O = O

499 k J

{m o l}^{- 1}

H - O

460 k J

{m o l}^{- 1}

O^{2 -} (g)

O (g) + e^{-} ⟶ O^{-} (g)

Δ H = - 142 k J / m o l

O^{-} (g) + e^{-} ⟶ O^{2 -} (g)

Δ H = 844 k J / m o l

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