Lecture 3

Question 1

True or false. There are reactions that go into completion.

Answer 1

False. There are no reactions that ever go into completion.

Question 2

Why are reactions only assumed to be irreversible?

Answer 2

Reactions are only assumed to be irreversible because of the large amount of equilibrium constant.

Question 3

All Rate Laws for reversible reactions must reduce to

Answer 3

the thermodynamic relationship relating the reacting species concentration at equilibrium.

Question 4

At equilibrium, rate of reaction is

Answer 4

identically zero for all species – 𝑟𝐴 ≅ 0

Question 5

The concentrations at equilibrium are related by

Answer 5

the thermodynamic relationship for the equilibrium constant.

Question 6

The units of the thermodynamic equilibrium constant, 𝐾𝐶 are

Answer 6

moles/volume

Question 7

the equilibrium constant ____ with _____ temperature for exothermic reactions

Answer 7

decreases, increasing

Question 8

the equilibrium constant ____ with _____ temperature for endothermic reactions

Answer 8

increases, increasing