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If at 298 K the bond energies of C-H, C-...

If at 298 K the bond energies of C-H, C-C, C=C and H-H bonds are respectively 414, 347, 615 and 435 kJ mol`""^(-1)`, the value of enthalpy change for the rection, `H_2C =CH_(2) (g)+ H,(g) to H_3C-CH_(3)` (g) at 298 K will

A

`+125 kJ`

B

`-125 kJ`

C

`+250 kJ`

D

`-250kJ`

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