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Problem: The following reaction occurs in a closed container:A(g) + 2 B(g) → 2 C(g)A reaction mixture initially contains 1.6 L of A and 2.1 L of B.Assuming that the volume and temperature of the reaction mixture remain constant, what is the percent change in pressure if the reaction goes to completion?

FREE Expert Solution

Determine the partial pressure of A and B. 

Recall that the partial pressure of a gas (PGas) in a mixture is given by:

Pgas=χgasPtotal

where: 

χGas = mole fraction of the gas
Ptotal = total pressure of the gas mixture


Assuming the volume fraction is equal to the mole fraction. 

χA=1.6 L1.6 L+2.1 LχA=1.6 L3.7 L

χA = 0.4324

χB=2.1 L1.6 L+2.1 LχB=2.1 L3.7 L

χB = 0.5675


Determine the partial pressure of A and B:

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Problem Details

The following reaction occurs in a closed container:
A(g) + 2 B(g) → 2 C(g)
A reaction mixture initially contains 1.6 L of A and 2.1 L of B.

Assuming that the volume and temperature of the reaction mixture remain constant, what is the percent change in pressure if the reaction goes to completion?

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Gas Stoichiometry concept. If you need more Gas Stoichiometry practice, you can also practice Gas Stoichiometry practice problems.