Phases

Question 1

As pressure increases, is liquid water or solid water (ice) favored?

Answer 1

Liquid water.
The negative slope of the phase diagram for water at the line between liquid and solid shows that at higher temperatures liquid water is favored.

Question 2

Does H2SO4 or H20 have a higher boiling point?

Answer 2

H2SO4
They both have strong hydrogen bonding, but H2SO4 is larger and larger molecules tend to have higher boiling points. Also, H2SO4 has more places to hydrogen bond.

Question 3

Does water’s melting point increase or decrease with decreasing external pressure?

Answer 3

Increases because of the negative solid-liquid boundary in the phase diagram.

Question 4

The most volatile compounds have what characteristics?

Answer 4

Weak intermolecular forces

High vapor pressure at room pressure

Question 5

What is the temperature of a solution with 1% ice and 99% liquid water?

Answer 5

As long as there is ice and liquid water coexisting at equilibrium, the temperature will be 0 degrees Celcius at 1 atm.

Question 6

What is the temperature of a solution with 99% ice and 1% liquid water?

Answer 6

As long as there is ice and liquid water coexisting at equilibrium, the temperature will be 0 degrees Celcius at 1 atm.