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Topic: Question help, Kc and Kp  (Read 2930 times)

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Offline IamWhatonearth

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Question help, Kc and Kp
« on: March 11, 2014, 11:33:53 PM »
Nevermind! Found out I was using the wrong form of R, should had been using 0.08206

There was this weird question in my book I can't figure out.

The equilibrium constant Kp for the following equilibrium is 32 at 298 K. What is the value of Kc for this same equilibrium at 298 K.

A(g) + B(g)<---> AB(g)

I found two equations that looked like they would work.
1) Kp=Kc/rt
2) Kp=Kc(RT)^delta n

If I use them they seem to equal the same really big number?

Book answer says it should equal 780.

I was using T as temp and R as 8.314.

Ideas?
« Last Edit: March 11, 2014, 11:55:44 PM by IamWhatonearth »

Offline Borek

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Re: Question help, Kc and Kp
« Reply #1 on: March 12, 2014, 03:30:49 AM »
1) Kp=Kc/rt
2) Kp=Kc(RT)^delta n

Are they different?
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Offline IamWhatonearth

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Re: Question help, Kc and Kp
« Reply #2 on: March 13, 2014, 11:52:19 PM »
I was thinking about it and I think the first one is a variation of the second one.

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