Problem: Phosgene, COCl2, a poisonous gas, decomposes according to the equationCOCl2(g) ⇌ CO(g) + Cl2(g)Calculate Kp for this reaction if Kc = 0.083 at 900ºC.A)  0.125B)  8.0            C)  6.1            D)  0.16          E)  0.083

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FREE Expert Solution

We are being asked to calculate Kp for the decomposition of phosgene (CoCl2) where its Kc is given.

COCl2(g)  CO(g) + Cl2(g)


When dealing with equilibrium:

Kc → equilibrium units are in molarity 
Kp → equilibrium units in terms of pressure


Kp and Kc are related to one another by the following equation below: 

Kp=KcRTn

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Problem Details

Phosgene, COCl2, a poisonous gas, decomposes according to the equation

COCl2(g) ⇌ CO(g) + Cl2(g)

Calculate Kp for this reaction if Kc = 0.083 at 900ºC.

A)  0.125

B)  8.0            

C)  6.1            

D)  0.16          

E)  0.083

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