Phase and Phase Changes

Question 0

Raoult’s Law

Answer 0

This law has to do with vapor pressure lowering, where vapor pressure is proportional to the mole fraction: P = X(total Pressure)

Question 1

Azeotrope

Answer 1

Liquid mixture of multiple substances that has a constant boiling point greater than or less than that of the substances that make it up, making it difficult to separate since the vapor had the same composition.

Question 2

Triple Point

Answer 2

Point at which all three phases are in equilibria.

Question 3

Phase Diagram

Answer 3

Pressure v Temperature plot

Question 4

Colligative Properties

Answer 4

Properties affected only by the number of solute particles dissolved and not by their chemical identities.

Question 5

Critical Point

Answer 5

The highest temperature and pressure when liquid and gas distinction is impossible.

Question 6

Why does freezing point depression occur?

Answer 6

The solute particles interfere with crystal formation.

Question 7

Why does boiling point elevation occur?

Answer 7

The vapor pressure of a solution is lower than that of the pure solvent, meaning that more energy is necessary for the vapor pressure to equal atmospheric pressure.

Question 8

Osmotic Pressure

Answer 8

The pressure exerted by the water level to counterbalance the tendency of water to flow across the membrane.
Π = MRT