10.8 Kinetics of reactions in solution (3)Kinetics treatment For diffusion control ka=4(ra+r36nAB r=4丌(r+3)(D、+D3)NANB AB ka=4T(rA +B(Da +Db) 8k T n= Aexp 77 RT For spherical particle Einstein-Storks equation 8k T E exp 3A RT k T D tnr For diffusion.ex 10 kJ. mol-I Macro-viscosity or micro-viscositA B A B A B A B 4 ( )( ) d r r r D D N N k N N = + +  = A B A B 4 ( )( ) d k r r D D = + +  B A B A B 1 1 4 ( ) ( ) 6 d k T k r r r r   For diffusion control = + + (3) Kinetics treatment 6 B k T D r = For spherical particle, Einstein-Storks equation If rA = rB B 8 3 d k T k  = exp E a A RT    =     B 8 exp 3 a d k T E k A RT   = −    For diffusion, Ea  10 kJmol-1 Macro-viscosity or micro-viscosity? 10.8 Kinetics of reactions in solution