Question

CH4C(g) + 2H2(g)—700C—>?

Answer 1

Answer:

C(g)+4H(g)⟶CH

4

(g);ΔH=−X

1

kcal

Its reverse will be the reaction for the dissociation of methane which will give the dissociation energy of methane.

Average bond energy of C−−H bond is

No.ofbondbroken

DissociationenergyofCH

4

=

4

X

1

Thus, the average bond energy of C−H bond is

4

X

1

kcalmol

−1

.