Chemistry Unit 4 Review

Front

What happens to the equilibrium position when pressure is increased in a reaction with fewer moles of gas on the product side?

Back

The equilibrium shifts to the right to reduce pressure, as there are fewer moles of gas on the product side.

Front

Which factors affect the position of equilibrium?

Back

Concentration, Pressure, Temperature. (States of matter do not affect equilibrium position.)

Front

What does the number representing the potential energy (PE) of the activated complex indicate?

Back

It indicates the energy level at which reactants can form products.

Front

What is the effect of adding a reactant to a system at equilibrium?

Back

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

Front

What happens to the equilibrium when heat is removed from an exothermic reaction?

Back

The equilibrium shifts to the left, favoring the formation of reactants.

Front

Define Le Chatelier's Principle.

Back

If a dynamic equilibrium is disturbed by changing the conditions, the position of equilibrium shifts to counteract the change.

Front

What is the role of temperature in shifting equilibrium?

Back

Increasing temperature shifts equilibrium in the endothermic direction; decreasing temperature shifts it in the exothermic direction.

Front

Explain the concept of activation energy.

Back

Activation energy is the minimum energy required for a reaction to occur.

Front

What is an exothermic reaction?

Back

A reaction that releases heat to the surroundings.

Front

What is an endothermic reaction?

Back

A reaction that absorbs heat from the surroundings.