What is activation energy ?

What is excitation energy ?

What is ionization energy ?

Reaction A+B rarr C +D+38 kcal has activation energy 20 kcal . Activation energy for reaction C+D rarr A+B is :

The ezyme catalysed reaction is faster than a metal catalysed reaction because its activation energy is :

Give equation to calculate activation energy when rate constants known at two different temperatures.

The rate of most reactions becomes double when their temperature is raised from 298 K to 308 K. Calculate their activation energy.