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//Estimate the Rate constant for a diffusion controlled reaction in water
//Example 12.3
clc;
clear;
R=8.314; //Gas constant in J K^-1 mol^-1
T=298; //Absolute temperature in K
eta=8.9*10^-4; //Viscosity of water in J s m^-3 (1J=1N m therefore N s m^-2=J s m^-3 )
KD=(8*R*T)*1000/(3*eta); //Rate constant for diffusion controlled reaction in M^-1 s^-1(1 m^3 mol^-1 s^-1=1000 M^-1 s^-1)
printf("Rate constant for diffusion controlled reaction = %.1f*10^9 M^-1 s^-1",KD*10^-9);
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