Answer
a. Decrease.
b. Decrease.
c. Increase.
Work Step by Step
1. Identify the amount of moles of gas in each side.
a. Reactants: 3 moles; Products: 2 moles.
b. Reactants: 3 moles; Products: 1 mole.
c. Reactants: 1 mole; Products: 2 moles.
2. If the products are the side with the fewer number of moles, decreasing the volume of the container will increase the yield of products, and vice-versa.
a. Products have fewer moles of gas: decrease the volume.
b. Products have fewer moles of gas: decrease the volume.
c. Products have more moles of gas: increase the volume.