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Using the data provided, calculate the m...

Using the data provided, calculate the multiple bond energy (`kJ "mol"^(-1)`) of a `C equiv C` bond in `C_(2)H_(2)`.That energy is (take the bond enrgy of a C-H bond as 350 kJ ` "mol"^(-1)`):
`2C(s) + H_(2)(g) to C_(2)H_(2)(g), DeltaH = 225 kJ "mol"^(-1)`
`2C(s) to 2C(g), DeltaH = 1410 kJ "mol"^(-1)`
`H_(2)(g) to 2H(g), DeltaH = 330 kJ "mol"^(-1)`

A

1165

B

837

C

865

D

815

Text Solution

Verified by Experts

The correct Answer is:
D

`:. DeltaH = + 1410 + 330 - (350 xx2) - E_(C -=C) = + 225`
`:. E_(C -=C) = 1740 - 700 - 225 = +815 kJ//mol`.
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