## K

$PV=nRT$

Luyan Zhang - 2D
Posts: 103
Joined: Sat Jul 20, 2019 12:16 am

### K

For Kc and Kp, would the constant be the same no matter whether you plug in the concentration or the partial pressure?

nehashetty_2G
Posts: 102
Joined: Thu Jul 25, 2019 12:15 am

### Re: K

Yes, it should be! Because, the only reason we use Kp versus Kc is based on the phases of the reactants/products (and whether the concentration or partial pressure is give to us for gases).

Vincent Leong 2B
Posts: 207
Joined: Fri Aug 09, 2019 12:15 am

### Re: K

The only thing that affects the equilibrium constant or the equilibrium conditions of the reaction is temperature. Understanding the E in the ICE table also helps when explaining why this is or how initial concentration/partial pressures will impact the concentrations/partial pressures of products and reactants at equilibrium.

Natalie Benitez 1E
Posts: 100
Joined: Fri Aug 02, 2019 12:15 am

### Re: K

I'm not sure if the constant Kc will be the same as Kp but I do know that they are used on whether you were given concentrations or if you were given partial pressures.

Sydney Myers 4I
Posts: 100
Joined: Fri Aug 09, 2019 12:17 am

### Re: K

Since the concentration and the pressure can be related by a factor of R*T (using the ideal gas law), the K should be the same whether you use partial pressures of temperature.

Abigail_Hagen2G
Posts: 107
Joined: Fri Aug 09, 2019 12:17 am

### Re: K

It will be the same, because even if you use partial pressure instead of concentration, you would still be able to convert between the two.

Manav Govil 1B
Posts: 104
Joined: Sat Sep 07, 2019 12:19 am

### Re: K

K is the equilibrium constant, which can be measured by either comparing the concentrations of the reactants and the products in the reaction, or the partial pressures of the reactants and products in the said reaction. Since K is a constant, whenever it is used (as Kc or Kp), it should equate. With this knowledge, you can potentially find missing partial pressures or concentrations if proved information of the latter.

Astrid Lunde 1I
Posts: 103
Joined: Sat Sep 07, 2019 12:16 am

### Re: K

Yes it will still be the same, but Kc is in terms of Moles and Kp is in terms of Bars.

205150314
Posts: 106
Joined: Wed Feb 20, 2019 12:16 am

### Re: K

If Kc and Kp are suppose to be the same, then why does the chart on 5G.2 have different values for some K and Kc?

Ruth Glauber 1C
Posts: 100
Joined: Wed Sep 18, 2019 12:20 am

### Re: K

Yes I think so!

gabbymaraziti
Posts: 111
Joined: Wed Sep 18, 2019 12:19 am

### Re: K

Kc and Kp are the same, they are just used for reactions in different states.