When ethyne is passed through a red hot tube- then formation of benzene takes place- H f - C 2 H 2 g -230 kJ mol -1H f - C 6 H 6 g -85 kJ mol -1Calculate the standard heat of trimerisation of ethyne to benzene- 3 C 2 H 2 g - C 6 H 6 g A- 205 kJ mol -1B- 605 kJ mol -1C- -605 kJ mol -1D- 205 kJ mol -1

The correct option is C 605 kJ mol^ 1Δ H_reaction=Δ H^∘_f(c_6H_6) 3Δ nbsp;H^∘_f(C_2H_2) =85 3(230) = 605 kJ mol^ 1. ...

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Heat of Reaction

When ethyne i...

Question

When ethyne is passed through a red hot tube, then formation of benzene takes place:
$Δ H_{f (C_{2} H_{2}) (g)}^{\circ} = 230 k J m o l^{- 1}$
$H_{f (C_{6} H_{6}) (g)}^{\circ} = 85 k J m o l^{- 1}$
Calculate the standard heat of trimerisation of ethyne to benzene.
$3 C_{2} H_{2} (g) \to C_{6} H_{6} (g)$

205 k J m o l^{- 1}

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605 k J m o l^{- 1}

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- 605 k J m o l^{- 1}

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205 k J m o l^{- 1}

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Δ H_{f (C_{2} H_{2}) (g)}^{\circ} = 230 k J m o l^{- 1}

H_{f (C_{6} H_{6}) (g)}^{\circ} = 85 k J m o l^{- 1}

3 C_{2} H_{2} (g) \to C_{6} H_{6} (g)

Δ H_{f (C_{2} H_{2}) (g)}^{o} = 230 k J {m o l}^{- 1}

Δ H_{f (C_{6} H_{6}) (g)}^{o} = 85 k J {m o l}^{- 1}

C_{2} H_{2} (g) ⟶ C_{6} H_{6} (g)

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