How is delta G related to the equilibrium constant? Chemistry Thermochemistry Spontaneous and Non-Spontaneous Processes 1 Answer Michael Apr 21, 2015 The relationship is: #DeltaG^(0)=-RTlnK# #R# is the gas constant = #8.31"J/K""/""mol"# #T# is the absolute temperature #K# is the equilibrium constant Large values of #K# result in negative values of #DeltaG# indicating reaction spontaneity. Answer link Related questions What conditions are spontaneous processes trying to satisfy? Why are spontaneous processes irreversible? Why are all spontaneous processes not exothermic? Why do spontaneous processes increase entropy? Why is diffusion a spontaneous process? Why is an exothermic reaction spontaneous? Why is free energy affected by changes in temperature? Does ΔG = 0 at equilibrium? Is delta G zero at boiling point? How can I calculate delta G of vaporization? See all questions in Spontaneous and Non-Spontaneous Processes Impact of this question 12813 views around the world You can reuse this answer Creative Commons License