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### Kp

Posted: Tue Nov 15, 2016 10:12 am
Do we include solids and liquids in Kp? I know we don't in Kc and am confused about Kp so would just like to clarify.

### Re: Kp

Posted: Tue Nov 15, 2016 10:25 am
Solids and liquids are not included in Kp or Kc, as they do not affect K at equilibrium.

### Re: Kp

Posted: Tue Nov 15, 2016 10:28 am
We don't include solids and liquids in both Kc and Kp. We don't include them in any equilibrium constants because solids and liquids don't affect the reaction reaching equilibrium. Equilibrium constants only depend on the gases and aqueous solutions included in the reaction.

### Re: Kp

Posted: Thu Nov 17, 2016 1:37 pm
Kp actually means K, which can be regarded equivalently to Kc.
Pure substances like solids and liquid are not included in the calculation of equilibrium constant, no matter if it's Kp or Kc.

### Re: Kp

Posted: Thu Nov 17, 2016 10:51 pm
When calculating Kp, only gases are used.

Solids and liquids are excluded from this calculation.

### Re: Kp

Posted: Sun Nov 20, 2016 10:04 pm
Do we have to know how to convert between Kp and Kc?

### Re: Kp

Posted: Sun Nov 20, 2016 11:03 pm
We only include gas in Kp, not liquids and solids, because we are using partial pressures to calculate Kp.