Chemistry Chapter 13

Which has the highest vapor pressure?

5 mL of water at 299K

Under standard conditions, what is the vapor pressure of water at 100. ºC?

760 torr

Which has the lowest vapor pressure?

25 mL of water at 283K

The name for (NH4)3PO4 . 3H2O is?

Ammonium phosphate trihydrate

Which segment in the following figure indicated by letters corresponds to melting?

BC

The term that best describes the rise of a liquid in a thin glass cylinder is?

Capillary action

As the attractive forces between the molecules of a liquid increase, its equilibrium vapor pressure at a given temperature.

Decreases

As the attractive forces between the molecules of a liquid increase, its volatility.

Decreases

As the temperature of a liquid increases, its vapor pressure decreases. T/F?

False

Evaportation is an exothermic process. T/F?

False

Sublimation is the change from the solid phase to the liquid phase. T/F?

False

The amount of energy required to change one gram of a solid, at its freezing point, to a liquid is called its heat of?

Fusion

The vapor pressure of a liquid is the pressure, at equilibrium, of the?

Gas above its liquid

Which of the liquids below displays the strongest intermolecular forces?

H2O

Which of the following is capable of forming a hydrogen bond?

HF

Hydrogen bonds will form between molecules of compounds in which hydrogen is bonded to atoms of element with?

High electronegativity and small atomic radius

As the attractive forces between molecules of a liquid increase, its surface tension.

Increases

As the volatility of liquid increases, its equilibrium vapor pressure?

Increases

The boiling point temperature of a liquid is the temperature at which its vapor pressure

Is equal to the external pressure

Which phase change corresponds to evaporation?

Liquid to gas

Which of the following properties of water is not affected by hydrogen bonding?

Molar mass

The freezing point of a substance is the temperature at which its?

Solid phase is equilibrium with its liquid phase

Which phase change corresponds to sublimation?

Solid to gas

Which phase change corresponds to fusion?

Solid to liquid

The amount of energy required to change one gram of a liquid, at its boiling point, to a gas is called?

Vaporization

Which phase or states are present within the CD segment?

liquid only