Is it possible to distinguish kc from kp by comparing the units used to express the equilibrium constnat?

Question

Chemistry

Alexandra Irwin

9 March, 20:21

Is it possible to distinguish kc from kp by comparing the units used to express the equilibrium constnat?

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Mitchell Garcia · Answer 1

Yes, it is possible to distinguish Kc from Kp.

Kc is defined by molar concentrations, whereas Kp is defined by the partial pressures of the gasses inside a closed system, so units is different.

For Kc will be (mol/dm³) ˣ or (mol/L) ˣ and for Kp will be Paˣ, atmˣ or torrˣ.

Kc = Kp·R·T.

R - gas constant.

T - temperature.