A Levels Chemistry

The diagram shows the Maxwell-Boltzmann energy distribution curve for molecules of a mixture
of two gases at a given temperature. For a reaction to occur the molecules must collide together
with sufficient energy.
number of
molecules
E22
energy
E, is the activation energy for the reaction between the gases. Of the two values shown, one is
for a catalysed reaction, the other for an uncatalysed one.
Which pair of statements is correct when a catalyst is used?
A Ea1 catalysed reaction
E22 uncatalysed reaction
more effective collisions
fewer effective collisions
B Ea1 uncatalysed reaction
Ea2 catalysed reaction
more effective collisions
fewer effective collisions
C Ea1 catalysed reaction
E22 uncatalysed reaction
more effective collisions
fewer effective collisions
D Eat uncatalysed reaction
more effective collisions
Ea2 catalysed reaction
fewer effective collisions


Equilibria | 2009 - M/J - 9701/1 | Q10