VITEEE 2016 Paper

Using Arrhenius equation,
K = A.e−

Ea

Rt

, we get
log k = log A -

Ea

2.303RT

∴ log k1 = log A -

Ea(1)

2.303RT

... (i)
and log k2 = log A -

Ea(2)

2.303RT

... (ii)
or log

k2

k1

=

1

2.303RT

[Ea(1)−Ea(2)] (from (i) and (ii))
=

1

2.303×8.314×300

(76000 - 57000)
or log

k2

k1

=

19000

2.303×8.314×300

=

190

6.9×8.314

or

k2

k1

= 2000 [taking antilog]