2. This reaction has reached equilibrium at 40.0 oC, and the total pressure is measured to be 0.363 atm. What is the equilibrium partial pressure of? H3?

0.242 atm

Explanation:

The reaction is missing. I think this is the original question.

NH₄CO₂NH₂ (s) ⇄ 2 NH₃ (g) + CO₂ (g)

This reaction has reached equilibrium at 40.0°C, and the total pressure is measured to be 0.363 atm. What is the equilibrium partial pressure of NH₃?

Let's consider the following reaction.

NH₄CO₂NH₂ (s) ⇄ 2 NH₃ (g) + CO₂ (g)

We can find the partial pressures at equilibrium using an ICE Chart.

NH₄CO₂NH₂ (s) ⇄ 2 NH₃ (g) + CO₂ (g)

I 0 0

C + 2x + x

E 2x x

The total pressure is the sum of the partial pressures.

P = pNH₃ + pCO₂

0.363 atm = 2x + x = 3x

x = 0.121 atm

The partial pressure of NH₃ is 2x = 2. (0.121 atm) = 0.242 atm