## Kp?

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Christine Nguyen 3D
Posts: 90
Joined: Wed Sep 30, 2020 9:40 pm

### Kp?

I understand that you solve for Kp the same way you would solve for Kc, but does partial pressure only apply to gases?

Minahil_Tufail_3I
Posts: 89
Joined: Wed Sep 30, 2020 10:00 pm

### Re: Kp?

Yes, I believe partial pressure only applies to gases!

Biona Hui 1G
Posts: 14
Joined: Sun Jan 10, 2021 12:17 am

### Re: Kp?

Yep, partial pressure, based on what we've learned, only applies to gases.

605291562
Posts: 86
Joined: Wed Sep 30, 2020 10:07 pm

### Re: Kp?

Yeah, I believe he said in lecture for the purpose of this class we only need to think of partial pressure applied to gasses

Nathan Tong 3G
Posts: 87
Joined: Wed Sep 30, 2020 9:49 pm

### Re: Kp?

Partial pressure is not typically used for the other phases.
Last edited by Nathan Tong 3G on Sun Jan 17, 2021 9:24 pm, edited 1 time in total.

Rohit Srinivas 2D
Posts: 89
Joined: Wed Sep 30, 2020 9:52 pm

### Re: Kp?

Yes, this is because ideal gasses assume that they do not interact with each other as their collisions are considered negligible. Hence, their partial pressures are calculated which is equal to their "concentration". Additionally, the units for Kp do not matter as they will cancel out if the equation is set up correctly.

Bhuvan Kommineni 3L
Posts: 36
Joined: Thu Dec 17, 2020 12:18 am

### Re: Kp?

Partial pressure is only applicable to gases!

305572629
Posts: 86
Joined: Wed Sep 30, 2020 9:41 pm

### Re: Kp?

yes- in some tricky problems liquids and aqueous components may be included, but just emit them since partial pressure can only apply to gases.

Posts: 142
Joined: Wed Sep 30, 2020 9:41 pm
Been upvoted: 2 times

### Re: Kp?

Yes, as partial pressure can only be measured for gases. With Kc, you are looking at the concentrations of substances, in which case you would omit solids and liquids.

Bai Rong Lin 2K
Posts: 86
Joined: Wed Sep 30, 2020 9:54 pm

### Re: Kp?

I believe it is measured for gases.

Lauren Mungo 1K
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Joined: Wed Sep 30, 2020 10:08 pm
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### Re: Kp?

yes, partial pressure applies to gases while molar concentrations applies to aqueous compounds

Mansi Solanki 3A
Posts: 86
Joined: Wed Sep 30, 2020 9:55 pm
Been upvoted: 1 time

### Re: Kp?

Yes, partial pressure applies to gases and can be used for the Kp value.

Bella Bursulaya 3G
Posts: 133
Joined: Wed Sep 30, 2020 9:54 pm

### Re: Kp?

Yep, only for gases because remember that solids and liquids cannot have partial pressures. Therefore, partial pressures only apply to gases.

Carlos Martinez 2K
Posts: 15
Joined: Wed Nov 14, 2018 12:20 am

### Re: Kp?

yes, Kp would only apply to gasses. Also remember that Kc does not apply to pure liquids or solids.

Jerry_T
Posts: 89
Joined: Wed Sep 30, 2020 9:46 pm

### Re: Kp?

Partial pressure only applies to gases because you cannot change the pressure of liquids and solids significantly.

Jaclyn Schwartz 1I
Posts: 94
Joined: Wed Sep 30, 2020 9:45 pm

### Re: Kp?

Partial Pressures are only for gases in this course!

Brandon Gruender 3F
Posts: 86
Joined: Wed Sep 30, 2020 10:03 pm

### Re: Kp?

Yes, partial pressure only applies to gases.

Giselle Granda 3F
Posts: 104
Joined: Wed Sep 30, 2020 10:00 pm

### Re: Kp?

Yes, partial pressure only applies to gases, and when you set up your Kp expression, you use parentheses instead of brackets which are used for concentration. It shouldn't be a big deal however if you use brackets or parenthesis because it will not make a difference in your answer.

Diana Aguilar 3H
Posts: 85
Joined: Wed Sep 30, 2020 9:50 pm

### Re: Kp?

Yes, like many have stated, partial pressure only applies to gases!

Jasmine Yi 1G
Posts: 85
Joined: Wed Sep 30, 2020 9:37 pm

### Re: Kp?

Yes, Kp is for gases

Yeonjoo Kim 2B
Posts: 14
Joined: Wed Sep 18, 2019 12:17 am

### Re: Kp?

Yes, partial pressure only applies to gases!

AJForte-2C
Posts: 89
Joined: Wed Sep 30, 2020 10:00 pm
Been upvoted: 1 time

### Re: Kp?

Partial pressure only applies to gases, so youll only solve for Kp when youre being asked about gases.

AlbertGu_2C
Posts: 86
Joined: Wed Sep 30, 2020 9:34 pm

### Re: Kp?

Kp is solved the same way as Kc is, except for partial pressures in place of concentrations

Christine Nguyen 3D
Posts: 90
Joined: Wed Sep 30, 2020 9:40 pm

### Re: Kp?

Minahil_Tufail_3I wrote:Yes, I believe partial pressure only applies to gases!

thank you :)

Christine Nguyen 3D
Posts: 90
Joined: Wed Sep 30, 2020 9:40 pm

### Re: Kp?

Giselle Granda 3F wrote:Yes, partial pressure only applies to gases, and when you set up your Kp expression, you use parentheses instead of brackets which are used for concentration. It shouldn't be a big deal however if you use brackets or parenthesis because it will not make a difference in your answer.

Thank you for the clarification! I oftentimes forget to replace the brackets with parentheses :)

Christine Nguyen 3D
Posts: 90
Joined: Wed Sep 30, 2020 9:40 pm

### Re: Kp?

605291562 wrote:Yeah, I believe he said in lecture for the purpose of this class we only need to think of partial pressure applied to gasses

Thank you so much, hopefully, there's nothing more to be learned for that haha :)

Neel Sharma 3F
Posts: 91
Joined: Wed Sep 30, 2020 9:32 pm
Been upvoted: 1 time

### Re: Kp?

Yes, partial pressures only apply to gases. I have noticed that K by itself indicated the equilibrium constant for gas reactions using bar as the standard measurement. Professor Lavelle allowed us to use atm interchangeably. Kc indicates concentration values using molarity. Hope this helps!

Victor Qiu 1C
Posts: 98
Joined: Wed Sep 30, 2020 9:59 pm
Been upvoted: 2 times

### Re: Kp?

Yes, partial pressure only applies to gases. Just imagine adding a solid, a liquid, and a gas into a closed box. The solid and liquid would just occupy some volume of that box, but the gas would occupied the entire volume of that box. Therefore, only the gas would have partial pressure.

Vivian_Le_1L
Posts: 35
Joined: Thu Dec 17, 2020 12:19 am

### Re: Kp?

Yes, Kp only applies to partial pressure of gases, while Kc can have concentrations of both gases and aqueous solutions.

ColmConnolly3D
Posts: 87
Joined: Wed Sep 30, 2020 10:06 pm
Been upvoted: 1 time

### Re: Kp?

Just a quick note as to why:

For at the level of precision we will be dealing with solids and liquids are incompressible. Thus, a change in PRESSure cannot affect the concentration of such substances.

Hope this helps!

Colm

Jenaye Brelland 2I
Posts: 95
Joined: Wed Sep 30, 2020 9:35 pm

### Re: Kp?

Yes, partial pressure only applies to gases.