The reaction between NO(g) and O2(g) to produce NO2(g) in a rigid reaction vessel is represented in — States of Matter Chemistry Question
Question
The reaction between NO(g) and O2(g) to produce NO2(g) in a rigid reaction vessel is represented in the diagram below. The pressure inside the container is recorded using a pressure gauge. Which of the following statements correctly predicts the change in pressure as the reaction goes to completion at constant temperature, and provides the correct explanation?
[VISUAL]
The pressure will increase because the product molecules have a greater mass than either of the reactant molecules.
The pressure will decrease because there are fewer molecules of product than of reactants.
The pressure will decrease because the product molecules have a lower average speed than the reactant molecules.
The pressure will not change because the total mass of the product molecules is the same as the total mass of the reactant molecules.