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Calorimetry

Calculate Δ...

Question

Calculate $Δ H^{o}$ of the reaction:
${C H}_{2} = {C H}_{2} + 3 O = O ⟶ 2 O = C = O + 2 H - O - H$
The average bond enthelpies of various bond are:
$B o n d C - H O = O C = O O - H C = C$
$B o n d e n t h a l p y$ : 414 499 724 460 619
[kJ/mol]

-364kJ

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-564kJ

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-964kJ

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-1654kJ

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Solution

The correct option is C -964kJ

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Similar questions

C = C, C - H, O = O, C - O, O - H

B E (k J {m o l}^{- 1}) : 619, 414, 499, 724, 460

(△ H)

2 C_{2} H_{2} (g) + 5 O_{2} (g) \to 4 C O_{2} (g) + 2 H_{2} O (g)

C - H, C \equiv C, O = O, C = O, O - H

k J m o l^{- 1}

C H_{2} = C H_{2} (g) + 3 O_{2} (g) \to 2 C O_{2} (g) + 2 H_{2} O (I)

C = C = 619 k J m o l^{- 1}

C - H = 414 k J m o l^{- 1}

O = O = 499 k J m o l^{- 1}

C = O = 724 k J m o l^{- 1}

O - H = 460 k J m o l^{- 1}

(δ H)

2 C_{2} H_{2 (g)} + 5 O_{2 (g)} \to 4 C O_{2 (g)} + 2 H_{2} O_{(g)}

C - H, C \equiv C, O = O, C = O, O - H

414, 814, 499, 724

640 k J m o l^{- 1}

△ H_{r}^{o}

C H_{2} C l_{2} (g) \to C (g) + 2 H (g) + 2 C l (g) .

414 k J m o l^{- 1}

330 k J m o l^{- 1} .

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