There's an equation that states ΔG = - RT ln K, where ΔG is the Gibbs' free energy at standard conditions, R is the universal gas constant, T is the temperature, and K is the equilibrium constant.

Is K = Kc (in terms of concentrations) or K = Kp (in terms of partial pressures)?

According to this equation it seems to be dimensionless!

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TopNewestBoth Kp nd Kc I guess, because any sort of equilibrium is considered in the equilibrium, it's just a particular value of the reaction quotient attained at equilibrium. – Dipanjan Chowdhury · 1 year, 4 months ago

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It is \(K_{c}\) i.e. in terms of concentration. – Akshay Yadav · 1 year, 5 months ago

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