Friday
April 18, 2014

Homework Help: equilibrium constant (Kp)

Posted by k on Wednesday, July 20, 2011 at 3:10pm.

What is the equilibrium constant "Kp" at 200 C for the reaction below:

P4(s) + 6 Cl2(g) --><-- 4 PCL3(l)

Given the following at 200 C

P4(s)+ 10 Cl2(g) --><-- 4 PCl5(s) Kc=8.12
PCl3(l)+ Cl2(g) --><-- PCl5(s) Kc=0.771

Answer: 6.7*[10^(-9)]

not sure what to do.

I know Kp=Kc(RT)^(delta n)
but the fact that they gave me two Kc values is confusing. Am I supposed to use those to somehow find the concentrations of the gaseous compounds?

Also, is "delta n" just the "final n" - "initial n" for the first reaction given (i.e. -3 or -6 depending on whether or not non-gasses count for "delta n" or not)?

Thank you in advance

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

chemistry - What is the equilibrium constant "Kp" at 200 C for the reaction ...
CHEMISTRY HELP! - Consider the following reactions and their equilibrium ...
Chemistry - PCl5 --> PCl3 + Cl2 (Kp = 630 at 546 K) A system is prepared by ...
Chemistry - The equilibrium constant Kc for the following reaction is equal to 0...
Chemistry - The equilibrium constant Kc for the following reaction is equal to 0...
chemistry - given the equilibrium constant for the following reaction at 500 K, ...
Chem II - The equilibrium constant, Kp for the reaction PCl5 <---> PCl3 + ...
Chem - Which direction will the following reaction in a 5.0 L flask proceed if ...
chemistry plse help - Use the standard reaction enthalpies given below to ...
chemistry - For the reaction below, Kp= 28.63 at 800 K. Calculate the ...

Search
Members