12C - Pressure

Question 1

1.

Def: What is henry’s law eqx? What does it state? When does it fail?

Answer 1

Gases are more soluble in water as pressure increases.
S-gas = k-H * P-gas
where S-gas is sol of gas
k-H is henrys law constant.
Fails if the gas reacts with water.

Question 2

Theory: Relate gas solubility in water with IF’s and temp.

Answer 2

Increases with IF’s with water
Decreases temp.

Question 3

Def: What is the Henry’s law consatnt formula?

Answer 3

k-H = k-Hnot * e^((-delta-Hsoln/R)(1/T - 1/Tnot))
Where k-Hnot is constant at 298 K.
Tnot is 298 K.