clear
clc
E1=0.771;//in V
E2=0.150;//in v
E=(E1-E2);//in V
n=2;//
F=96500;//in C/mol
R=8.314;//in J/Kmol
T=298;//in K
Keq=10^((n*F*E)/(2.303*R*T));//equilibrium constant
printf('Keq=%.1f*10^21',Keq/10^21)

//page 485