Question

A+B------->C ∆H=+60Kj/mol
Eaf is 150kJ( activation energy for forward reaction) then activation energy for backward reaction
1).210KJ.
2)105KJ
3)90KJ
4)145KJ

Answer 1

The activation energy of the backward reaction will be option (3) i.e 90KJ

Explanation :

For a chemical reaction we know that,

ΔH = Eaf - Eab

where,

Eaf = activation energy of forward reaction

Eab = Activation energy of backward reaction.

From the eqn we get,

Eab = Eaf - ΔH

= 150 - 60

=> Eab = 90 KJ.

Hence the activation energy of the backward reaction will be option (3) i.e 90KJ

Answer 2

Answer:

Hey! Friend...The answer is (3)90kJ