2. Qualitative Equilibrium

Question 1

What does a catalyst do?

Answer 1

Lower the activation energy of a reaction through providing a new reaction pathway.

Question 2

What is an open system?

Answer 2

A system in which matter and energy can enter and leave.

Question 3

What is a closed system?

Answer 3

A system in which matter cannot enter and leave but energy can enter and leave.

Question 4

What is an isolated system?

Answer 4

A system in which neither matter nor energy can enter nor leave.

Question 5

What is static equilibrium?

Answer 5

Equilibrium achieved when a reaction is no longer occurring.

Question 6

What is dynamic equilibrium?

Answer 6

Equilibrium achieved when there is a forward and reverse reaction are occurring at the same rate.

Question 7

What conditions must be met to achieve dynamic equilibrium?

Answer 7

The system must be closed, there must be high enough energy for the reaction to occur.

Question 8

What is collision theory?

Answer 8

For a reaction to occur, particles must collide with sufficient activation energy to break bonds and have correct orientation to allow new bonds to form.

Question 9

What sign is the ∆H of an exothermic reaction?

Answer 9

Negative

Question 10

What sign is the ∆H of an endothermic reaction?

Answer 10

Positive