## Equations

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jane_ni_2d
Posts: 67
Joined: Fri Sep 28, 2018 12:23 am

### Equations

What is the difference between Kc and Kp?

Matthew Tran 1H
Posts: 165
Joined: Fri Sep 28, 2018 12:16 am

### Re: Equations

Kc is calculated using the equilibrium molar concentrations of products and reactants while Kp is calculated using the equilibrium partial pressures of products and reactants and can only be used for gases. You can relate the two using P=(concentration)RT.

Jonathan Zhao 4H
Posts: 57
Joined: Fri Sep 28, 2018 12:26 am

### Re: Equations

Yes, you could easily convert between partial pressure to concentration by using PV=nRT.

anthony_trieu2L
Posts: 60
Joined: Fri Sep 28, 2018 12:29 am

### Re: Equations

When you are given equilibrium concentrations, you must use Kc to calculate the equilibrium constant. This can apply to both aqueous solutions and gases. In contrast, Kp can only be used to calculate the equilibrium constant of partial pressures. Kp cannot be applied to aqueous solutions since they do not have partial pressures.

Cole Doolittle 2K
Posts: 30
Joined: Fri Sep 28, 2018 12:20 am

### Re: Equations

Kp = Kc x (RT) ^ stoichiometric coefficient

In general, Kp uses partial pressures and Kc uses concentrations

Phil Timoteo 1K
Posts: 101
Joined: Fri Apr 06, 2018 11:05 am

### Re: Equations

Kc uses concentration and Kp uses partial pressure

Hilda Sauceda 3C
Posts: 76
Joined: Fri Sep 28, 2018 12:24 am

### Re: Equations

Kc- concentration and Kp- partial pressure

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