Question

write the equilibrium constant expression for the reaction if the equilibrium constant is 78

Answer 1

Consider the balanced reversible reaction below

aA+bB⇋cC+dD

if we know the molar concentrations for each reaction species, we can find the value for K_c using the relationship

K _C  =[C]^c[D]^d/ [A]^a[B]^b

K_C= 78

Compare this with the chemical equation for the equilibrium. The convention is that the substances on the right-hand side of the equation are written at the top of the K_c expression, and those on the left-hand side at the bottom.

The relationship between the two equilibrium constants are:

Kp=Kc(RT)^Δn