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 ?

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

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