Equlibrium question!!?

Question

At 275 oC, the equilibrium constant for the reaction below is 1.04 x 10-2

NH4Cl (s) ó NH3 (g) + HCl (g)

A 0.980 g sample of the solid NH4Cl is placed in a 1.000 L closed container and heated to 275 oC.

a) Will there be any decomposition of the NH4Cl when the system comes to equilibrium at 275 oC? (Compare Q to K)

How would i go about doing this problem?

Answer 1

[NH3][Cl] = 1.04 x 10^-2

[NH3]=[Cl]

[NH3]^2 = 1.04 x 10^-2

[NH3]=[Cl] = √(1.04 x 10^-2) = 1.02  x 10^-1 moles/liter

a) Yes there will be some decomposition.