Calculate heat of combusion of ethene:

1.	Calculate heat of combusion of ethene:
Answer» `DeltaH^(Theta) =` Sum of bond energies of reactants -Sum of bond energies of products `= [DeltaH_((C=C))+4DeltaH_((C-H)) +3xxDeltaH_((O=O))]` `-[4 xx DeltaH_((C=O)) +4 xx DeltaH_((O-H))]` `=[619 +4 xx 414 +3 xx 499] -[4 xx 724 +4 xx 460]` `=- 964 kJ mol^(-1)`

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Calculate heat of combusion of ethene:

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