Ammonium carbamate (NH2CO2NH4) decomposes when heated and, in a sealed vessel, the following equilibrium is established,

NH4CO2NH2(s) â 2 NH3(g) + CO2(g)

with Kp = 2.9 x 10â3 at 25oC. (a) Calculate the total gas pressure at equilibrium.

(c) If 5.00 g NH4CO2NH2 was introduced into an evacuated 5.00-L reaction vessel and the above equilibrium is established at 25oC, how many grams of solid NH4CO2NH2 still remains at equilibrium?
(R = 0.0821 L.atm/mol.K)

I only need help with part (c).

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Sixta KovacekLv2

22 Feb 2019

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The decomposition of ammonium carbamate (NH4CO2NH2) is described in the reaction below: NH4CO2NH2 (s) 2NH3 (g) + CO2 (g) endothermic reaction A 9.407 g sample of NH4CO2NH2 (s) is placed in an evacuated (ie. initial pressure is 0 atm) 4.000 L vessel at 24Â°C. After equilibrium has been established, the total pressure of the system is 0.318 atm. Some NH4CO2NH2 (s) remains in the vessel. Show work and give answers to the correct number of significant figures.

a) What is the equilibrium partial pressure of NH3 (g) and CO2 (g), respectively?

b) Calculate the KP for the reaction.

c) Calculate the number of moles of NH4CO2NH2 (s) initially. Course: CHEM 1F92 (01, 02) Wednesday, August 31, 2016 Page 5 of 31 Question 2. (continued)

d) Calculate the number of moles of NH3 (g) at equilibrium.

e) What mole fraction of NH4CO2NH2 (s) has been decomposed to NH3 (g)? Report answer in percentage (%).

f) If the volume of the vessel were doubled at constant temperature, which direction would equilibrium shift? Circle the correct answer Shift to Products or Shift to Reactant

g) If the temperature of the system is increased at constant volume, which direction would equilibrium shift? Circle the correct answer. Shift to Products or Shift to Reactant

Ammonium carbamate ( NH4CO2NH2 ) decomposes as follows:
NH4CO2NH2(s) â 2 NH3(g) + CO2(g) , Kp = ?
When solid ammonium carbamate is placed in a container at 40Â°C., the total gas pressure (from NH3 and CO2) is 0.363 atm. What is the value of Kp for the reaction?
A) 5.98 x 10â3 B) 7.09 x 10â3 C) 2.93 x 10â2 D) 5.98 x 10â2 E) 3.63 x 10â1