Ecuación de Kapustinsky
Uret = 1/(4pe0)* (q1*q2/(r1+r2))*(1-ro/(r1+r2))*0.87*V*NA
1/(4pe0)=9·109 Nm2/C; ro=0.345·10-10 m; NA=6.023·1023 mol-1
q1(e)= * 1.6 ·10-19 C
q2(e)= * 1.6 ·10-19 C
r1(A)= * 1.0·10-10 m
r2(A)= * 1.0·10-10 m
V = Número de iones
Uret= kJ/mol