Theories of reaction rate-Transition state theory, Chemical Kinetics Assignment Help

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Transition state theory

(i) According to the transition state theory activated complex is supposed to be in equilibrium with reactant molecules.

(ii) Once if transition state is formed it can either return to the initial reactants or proceeds to form products.

(iii) Assuming that once formed transition state proceeds to the products we can say that rate is proportional to the concentration of transition state.

Mathematically, Rate  55_transition state theory.png Transition state

Rate= Constant × Transition state

(iv) The activation energy for the forward reaction,  885_transition state theory1.png  and activation energy for the reverse reaction  1409_transition state theory2.png   are related to enthalpy? H of reaction by the equation 1262_transition state theory3.png

(a)  For the endothermic reactions, ΔH>0 such that  1409_transition state theory2.png < 885_transition state theory1.png

(b)  For the exothermic reaction, ΔH<0  such that   1409_transition state theory2.png >  885_transition state theory1.png  .

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