## Partial pressure when calculating K

$PV=nRT$

Randi Gu
Posts: 13
Joined: Fri Jun 23, 2017 11:39 am

### Partial pressure when calculating K

If we want to use partial pressure to calculate equilibrium constant, shell we need to use PV=NRT this equation in order to change partial pressure to the concentration( N/V)?

Chem_Mod
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### Re: Partial pressure when calculating K

If you want to calculate Kc, yes.

Salman Azfar 1K
Posts: 50
Joined: Thu Jul 13, 2017 3:00 am

### Re: Partial pressure when calculating K

Alternatively, if the entire equation has only gases, you can just leave them all as pressures and get Kp instead.

Leah Thomas 2E
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Joined: Fri Sep 29, 2017 7:06 am

### Re: Partial pressure when calculating K

You only need to change gases to concentration from partial pressure if an aqueous solution is present in the equation meaning it is not homogenous.

Michael Cheng 1C
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Joined: Thu Jul 13, 2017 3:00 am

### Re: Partial pressure when calculating K

When do you use partial pressure versus concentration when finding equilibrium?