The value of K_a for nitrous acid (HNO₂) at 25 °C is given in Appendix D. (c) What is the value of ΔG at equilibrium?

Video transcript

Hello. In this problem, we are told at 25 degrees Celsius acid dissociation constant for Hydrofluoric acid is 7.2 times 10 minus four. Are asked to determine the change in gibbs free energy and equilibrium. Recall that the change in gibbs free energy under nonstandard conditions is equal to that under standard conditions plus R t l n f Q. Where Q is our reaction quotient at equilibrium. Then our reaction quotient is equal to our equilibrium constant, and the change in gibbs free energy is equal to zero. This allows us then to derive the equation that the change and gives free energy under standard conditions is equal to negative R T L N. Of our equilibrium constant. So the change in gibbs free energy is equal to zero at equilibrium. This corresponds then to answer C. Thanks for watching. Hope this help.