Q.
In a 0.5 litre capacity vessel, CO and Cl2 are mixed to form COCl2. At equilibrium, it contains 0.2 mole of COCl2 and 0.1 mole each of CO and Cl2. The equilibrium constant (Kc) for reaction
CO+Cl2⇌COCl2 is
In this reaction,
Number of moles of COCl2=0.2
Number of moles of CO=0.1
Number of moles of Cl=0.1
The concentration of COCl2 = Volumes in litres Number of moles =0.50.2=0.4molL−1
Concentration of CO=0.50.1=0.2molL−1
Concentration of Cl=0.50.1=0.2molL−1
The equilibrium constant of the reaction Kc=[CO][Cl2][COCl2]=0.2×0.20.4=10