Keq vs Kc

[Rita Chen 1B]

Is Keq the same as Kc?
When do we use which?

[Paul Hage 2G]

Keq is the generalized equilibrium constant, whereas Kc is the equilibrium constant found using concentration values. You would use Kc when you are specifically calculating the equilibrium constant using the molarity values of each reactant/product.

[Wendy 1E]

Also relevant to this discussion is how Kc is different than Kp. Kp is the equilibrium constant found using partial pressures. The method of calculating Kp is essentially the same as Kc, except Kp is calculated by the partial pressure of products/the partial pressure of the reactants.

[Ipsita Srinivas 1K]

Ok, just to clarify, K_c and K_p are just types of K_eq, and you label the equilibrium constant depending on whether K_eq is calculated using partial pressure or molar conc. ?

[Maya Beal Dis 1D]

When would we need to specify and use Kc as opposed to just using Keq?

[BNgo_2L]

Ok, just to clarify, K_c and K_p are just types of K_eq, and you label the equilibrium constant depending on whether K_eq is calculated using partial pressure or molar conc. ?

Yes, Kc and Kp are both types of Keq, and Keq is labelled based on whether you use concentration or partial pressures.

[BNgo_2L]

When would we need to specify and use Kc as opposed to just using Keq?

I believe we should use Kc any time we use concentrations to calculated Keq.