using the equilibrium constant expression to calculate the v

using the equilibrium constant expression to calculate the value of the equilibrium constant for each of the following reactions at 298k using data from appendix c in the textbook

A)NaHCO3(s) yields NaOH (s)+CO2(g)

B)2HBr(g)+Cl2(g) yields 2HCl(g)+Br2(g)

Solution

A)Kp=Pco2

and Kp=Kc(RT)

so Kc=Pco2/(RT)

B)Kp=Phcl^2Pbr2/(Phbr^2Pcl2)

so Kp=Kc

since the change in the number of moles is 0.so,

Kc=Phcl^2Pbr2/(Phbr^2Pcl2)