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