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If at 298 K the bond energies of CH, CC, C=C and HH bonds are respectively 414,347,615 and 435kJmol1, the value of enthalpy change for the reaction <br> H2C=CH2(g)+H2(g)H3CCH3(g) at 298 K will be :


( A ) +125kJ
( B ) 125kJ
( C ) +250kJ
( D ) 250kJ

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