Lecture 2

Question 1

How are the pressure applied above a solutions and the rate of gas molecules entering the solution related?

Answer 1

P increases = rate of gas molecules entering increases

Question 2

What is Henry’s Law and what is it used for?

Answer 2

C = kP
C –> concentration of dissolved gas in soln
k –> constant (characteristic of particular solution)
P –> partial pressure of gaseous SOLUTE (ABOVE THE SOLN)

Used to find concentration of a gas

Note: works for solutions where the solute does not dissociate

Question 3

When the intermolecular forces are strong, how is the change in energy? (delta H)

Answer 3

Positive and large
(tough to separate, so require a lot of energy to separate)

Question 4

When the intermolecular forces and weak, how is the change in energy? (delta H)

Answer 4

Positive and small
(require small amount of energy to separate)