1.

For the reaction, bondenergies are given as under – (i) C—C, 346 kJ/mol (ii) C—H, 413 kJ/mol (iii) H—H, 437 kJ/mol and (iv) C = C, 611 kJ/mol What will be the value of Delta H at 25^(@) C for the above reaction ?

Answer»

`-289 kJ mol^(-1)`
`-124 kJ mol^(-1)`
`+124 K J mol^(-1)`
`+ 289 k J mol^(-1)`

ANSWER :B


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