Unit 6 Review (Kinetics, Thermo, Equilibrium)

Front

What happens to the pressure of a gas when its volume remains constant and the gas is heated?

Back

The pressure of the gas increases.

Front

What is true for a system at equilibrium?

Back

The forward and reverse reaction rates are equal and the concentrations of reactants and products remain constant.

Front

If an endothermic reaction at equilibrium is heated, which way will the equilibrium shift?

Back

To the right (towards products).

Front

What does Le Chatelier's Principle state about a chemical system at equilibrium when it is stressed?

Back

The system will adjust to reduce the stress.

Front

In the reaction 2SO2(g) + O2(g) ⇌ 2SO3(g) ΔH = -197 kJ, which action will NOT shift the equilibrium to the right?

Back

Adding a catalyst.

Front

Define equilibrium in a chemical reaction.

Back

Equilibrium is the state in which the rates of the forward and reverse reactions are equal, resulting in constant concentrations of reactants and products.

Front

What is an endothermic reaction?

Back

An endothermic reaction is a chemical reaction that absorbs heat from its surroundings.

Front

What is an exothermic reaction?

Back

An exothermic reaction is a chemical reaction that releases heat to its surroundings.

Front

How does increasing the temperature affect an endothermic reaction at equilibrium?

Back

It shifts the equilibrium to the right, favoring the formation of products.

Front

What effect does decreasing the volume of a gaseous reaction mixture have on equilibrium?

Back

It shifts the equilibrium towards the side with fewer moles of gas.