The standard Gibb's free energy change (∆G∘) at standard conditions is given by the formula ∆G∘=−RT‌ln‌loKeq where, R is gas constant =8.314Jmol−1K−1, T=(25+273)K=298K and Keq is the equilibrium constant ∆G∘‌=−8.314×298×2.303‌log‌1012 =−68,470.18J=−68.47‌kJ
