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If the heats of formation of C(2)H(2) an...

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 `DeltaH` value for the trimerisation of `C_(2)H_(2)` is

A

`-605 kJ`

B

`-205 kJ`

C

`205 kJ`

D

`605 kJ`

Text Solution

Verified by Experts

The correct Answer is:
A
`3C_(2)H_(2) rarr C_(6)H_(6) , DeltaH=H_(P)-H_(R)`
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