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InterviewSolution
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Calculate `Delta H ^(@)` for the reaction `CH_(2)= CH_(2) + 3O_(2) rarr 2CO_(2)+ 2H_(2)O` Given that the average bond energies of the different bonds are `:` `{:("Bond",C-H,O=O,C=O,O-H,C=C),("Bond energy " ( kJ mol^(-1)),414,499,724,460,619):}` |
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Answer» Correct Answer - `-964 Kj mol^(-1)` `Deta_(r)H [B.E. (C=C) + 4B.E. (C-H) + 3 B.E.(O-O) ] - [ 2 xx 2 xx B.E. ( C=O) + 2 xx 2 xx B.E.(O-H) ]` ` [619+ 4 ( 414)]+ 3 ( 499) ] - [ 4 ( 724)+ 4 ( 460 ) ] kJ = - 964 kJ` |
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