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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 reaction H2C = CH2(g) + H2(g) ?H3C - CH3(g) at 298 K will be

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 reaction H2C = CH2(g) + H2(g) ?H3C - CH3(g) at 298 K will be

Grade:12

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