Page **1** of **1**

### Partial pressure when calculating K

Posted: **Fri Jul 28, 2017 10:29 pm**

by **Randi Gu**

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)?

### Re: Partial pressure when calculating K

Posted: **Sat Jul 29, 2017 8:58 am**

by **Chem_Mod**

If you want to calculate Kc, yes.

### Re: Partial pressure when calculating K

Posted: **Tue Nov 21, 2017 4:56 pm**

by **Salman Azfar 1K**

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

### Re: Partial pressure when calculating K

Posted: **Wed Nov 22, 2017 4:07 pm**

by **Leah Thomas 2E**

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.

### Re: Partial pressure when calculating K

Posted: **Sat Nov 25, 2017 9:41 pm**

by **Michael Cheng 1C**

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