Question

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 H,C = CH,(g) + H, (g) →H.C-CH,(g) at 298 K will be?
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Answer 1

Answer:

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