Difference between K vs. Kc± in Equilibrium Constant Chart

[Natalie Hurd 1H]

In the textbook Table 5G.2 contains a chart of equilibrium constants for specific equations. It has a column of K and Kc±. What is the difference between these value and which one are we supposed to use or when do we use each of them?

[Chem_Mod]

Kc by definition is the ratio of the equilibrium concentrations of products over the equilibrium concentrations of reactants each raised to the power of their stoichiometric coefficients. When given a K value, you can determine based off the context of the problem whether you'll be concerned with Kc. You won't be given a K value without context.