## Converting Kc to Kp

Lauren Huang 1H
Posts: 60
Joined: Fri Sep 28, 2018 12:16 am

### Converting Kc to Kp

Do we convert Kc to Kp or vice versa the same way we do for converting individual concentrations/partial pressures using P=(n/V)*(RT)?

Katie_Duong_1D
Posts: 69
Joined: Fri Sep 28, 2018 12:27 am

### Re: Converting Kc to Kp

kp = kc (RT)^ ((c+d) - (a+b)).
c+d - a+b is also known as delta n

The equilibrium constant for pressure is equal to the equilibrium constant for concentration times (gas constant R times temperature T (in K)) to the power of the mole change.

Kayla Vo 1B
Posts: 60
Joined: Fri Sep 28, 2018 12:26 am

### Re: Converting Kc to Kp

To clarify using the formula above, delta n is calculated via (c+d) - (a+b), where a and b are the coefficients of the gaseous reactants, and c and d are the coefficients of the gaseous products.

804994652
Posts: 68
Joined: Fri Sep 28, 2018 12:26 am

### Re: Converting Kc to Kp

I think we've learned how to find Kc and Kp (the way to do it for each is essentially the same) however we have not learned how to convert between the two. We know how to take pressure to concentration.