Converting Kc to Kp

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

Converting Kc to Kp

Postby Lauren Huang 1H » Mon Jan 14, 2019 12:20 am

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

Postby Katie_Duong_1D » Mon Jan 14, 2019 4:40 am

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

Postby Kayla Vo 1B » Mon Jan 14, 2019 2:18 pm

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

Postby 804994652 » Mon Jan 14, 2019 11:17 pm

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.


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