Does ΔG = 0 at equilibrium? Chemistry Thermochemistry Spontaneous and Non-Spontaneous Processes 1 Answer Michael Oct 31, 2014 Yes. #DeltaG=-lnK_c# If #DeltaG=0# then #K_c=1# So, in free energy terms we have equilibrium. 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? Is delta G zero at boiling point? How can I calculate delta G of vaporization? How is delta G related to the equilibrium constant? See all questions in Spontaneous and Non-Spontaneous Processes Impact of this question 4349 views around the world You can reuse this answer Creative Commons License