6), we get the rate
constant, k as
[
]
[ ]
R0
R
k
t
−
=
(3 7)
Zero order reactions are relatively uncommon but
they occur under special conditions Some enzyme
catalysed reactions and reactions which occur on
metal surfaces are a few examples of zero order
reactions The decomposition of gaseous ammonia
on a hot platinum surface is a zero order reaction at
high pressure