تفاوت پایداری سینتیکی و پایداری ترمودینامیکی

Kinetic stability basically occurs when the reactants react really slowly. The slower the reaction occurs, the greater the kinetic stability. If you say, "This reaction is kinetically stable," then that implies that the reaction occurs very slowly.

Thermodynamic stability depends on whether or not the reaction is spontaneous. This depends on the change in free energy (ΔG). A thermodynamically stable reaction is one that basically does not react. As a result, it is independent of the pathway between reactants and products.

It's like the diamond example :The reaction of diamond turning into graphite has a negative ΔG, meaning that it is thermodynamically unstable and will spontaneously occur. However, it will take an extremely long time for this to happen, showing that it is kinetically stable and so kinetics is controlling this reaction rather than thermodynamics.

Kinetics deals with the rate of a reaction and thermodynamics deals with whether the reaction is favorable or not.

A kinetically controlled reaction is one that does not occur because of a large activation energy barrier even though the products have a lower standard Gibbs free energy (i.e., the reaction is favorable because the product or products are more stable).

A well known example is diamond changing to graphite, which does not occur under ambient conditions even though graphite is thermodynamically more stable than diamond.