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Question

When ethyne is passed through a red hot tube, then formation of benzene takes place:
ΔHf(C2H2)(g)=230 kJ mol1
Hf(C6H6)(g)=85 kJ mol1
Calculate the standard heat of trimerisation of ethyne to benzene.
3C2H2(g)C6H6(g)

A
205 kJ mol1
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B
605 kJ mol1
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C
605 kJ mol1
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D
205 kJ mol1
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