Given the following graph.
(a) Calculate `Delta H` for the reaction and energy of activation for the forward and backward reaction.

(b) Curve (2) is the energy profile in the presence of a catalyst. What is the energy of activation for the two reaction in the presence of a catalyst?
( c) Will the catalyst change the extent of the reaction?

Explanation

(a) `Delta H = 100-10 = -10 kJ mol^(-1)`
`E_(a(f)) = 150-110 = 40kJ mol^(-1)`
`E_(a(b)) = 150 -100 = 50kJ mol^(-1)`
(b) `E_(a(f))` with catalyst `= 130 - 110 = 20 kJ`
`E_(a(b))` with catalyst `= 130 - 100 = 30 kJ`
( c) Catalyst does not change the extent of the reaction it only increases the rate of reaction.