College Chemistry: Eizenga

Problem #1

Ammonium carbamate, NH₄CO₂NH_2, decomposes according to the following reaction:

NH₄CO₂NH_2(s) ↔ 2NH_3(g) + CO_2(g)

Some ammonium carbamate is put into an evacuated container at 40ºC and allowed to come to equilibrium, the pressure in the container is found to be 0.363atm. What is the equilibrium constant K_p?

Problem #2

The dissociation of molecular iodine into iodine atoms is represented by:

I_2(g) ↔ 2I_(g)

At 1000 K the equilibrium constant, K_c = 3.80e-5. Suppose you start with 0.0456 mol of I₂ in a 2.30L flask at 1000 K and allow it to come to equilibrium. What are the concentrations of the molecular iodine and of the iodine atoms?