Chemical Kinetics

As in option (d), difference between energy of reactant and transition state is zero. Hence, it will show zero activation energy.

All radioactive elements follow first order kinetics, Given, days Rate constant, days Now, as we know for first order reaction, Here, days, or Or (where, number of half-life, initial mass of radioactive element, final mass)

In activation energy for a simple chemical reaction is in forward direction. The activation energy for reverse reaction can be less than or more than . The concept of activation energy gives an idea whether a given reaction is slow or fast at a given temperature. If the product is stable then activation energy for reverse reaction is more than but if the product is less stable then activation energy is less than