When ethyne is passed through a red hot tube- then formation of benzene takes place- - H-fC2H2g-230 kJ mol-1H-fC6H6g-85 kJ mol-1Calculate the standard heat of trimerisation of ethyne to benzene-3C2H2g- C6H6g

Δ 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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Standard XIII

Chemistry

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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Solution

The correct option is C $- 605 k J m o l^{- 1}$
$Δ H_{r e a c t i o n} = Δ H_{f (c_{6} H_{6})}^{\circ} - 3 Δ H_{f (C_{2} H_{2})}^{\circ}$
$= 85 - 3 (230)$
$= - 605 k J m o l^{- 1} .$

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Similar questions

Q. 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)

Q. When ethyne is passed through a red hot tube, then formation of benzene takes place:

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}

Calculate the standard heat of trimerisation of ethyne to benzene.

C_{2} H_{2} (g) ⟶ C_{6} H_{6} (g)

Q. Trimerisation of Ethyne to form Benzene is carried out using:

If the heats of formation of $C_{2} H_{2}$ and $C_{6} H_{6}$ are 230 KJ mol $^{- 1}$ and 85 KJ mol $^{- 1}$ respectively, the
$Δ$ H value for the trimerisation of $C_{2} H_{2}$ is:

Q. When ethyne is passed through a red hot tube, is formed

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When ethyne is passed through a red hot tube, then formation of benzene takes place: ΔH∘f(C2H2)(g)=230 kJ mol−1 H∘f(C6H6)(g)=85 kJ mol−1 Calculate the standard heat of trimerisation of ethyne to benzene. 3C2H2(g)→C6H6(g)

The correct option is C −605 kJ mol−1ΔHreaction=ΔH∘f(c6H6)−3ΔH∘f(C2H2) =85−3(230) =−605 kJ mol−1.

The correct option is C $- 605 k J m o l^{- 1}$
$Δ H_{r e a c t i o n} = Δ H_{f (c_{6} H_{6})}^{\circ} - 3 Δ H_{f (C_{2} H_{2})}^{\circ}$
$= 85 - 3 (230)$
$= - 605 k J m o l^{- 1} .$