Question 1

Which of the following compounds would be most soluble in carbon tetrachloride, CCl4?

Accepted Answer

A)  H2O 
B)  CH3OH 
C)  NH3 
D)  C6H6 
E)  HCl 
A)  H2O 
B)  CH3OH 
C)  NH3 
D)  C6H6 
E)  HCl

Question 2

Arrange the following compounds in order of increasing dispersion interactions: CCl4, CH4, C3H8.

Accepted Answer

A)  CH4 3H8 4 
B)  CCl4 4 3H8 
C)  C3H8 4 4 
D)  CCl4 3H8 4 
E)  CH4 4 3H8 
A)  CH4 3H8 4 
B)  CCl4 4 3H8 
C)  C3H8 4 4 
D)  CCl4 3H8 4 
E)  CH4 4 3H8

Question 3

The relative energies (strengths) of the intermolecular forces present in each of four different pure substances are shown in the figure below. Which substance has the highest melting point?

Accepted Answer

A)  a 
B)  b 
C)  c 
D)  d 
A)  a 
B)  b 
C)  c 
D)  d

Question 4

At the critical point, ________

Accepted Answer

A)  all the liquid has evaporated. 
B)  the densities of the solid and the liquid are the same. 
C)  the densities of the solid and the gas are the same. 
D)  the densities of the gas and the liquid are the same. 
E)  a critical mass has been reached. 
A)  all the liquid has evaporated. 
B)  the densities of the solid and the liquid are the same. 
C)  the densities of the solid and the gas are the same. 
D)  the densities of the gas and the liquid are the same. 
E)  a critical mass has been reached.

Question 5

Describe the utility of the Clausius-Clapeyron equation.

Accepted Answer

The Clausius-Clapeyron equation relates

Question 6

Gasoline is primarily a mixture of hydrocarbons and is sold with an octane rating that is based on a comparison with the combustion properties of isooctane. Gasoline usually contains an isomer of isooctane called tetramethylbutane (C8H18), which has an enthalpy of vaporization of 43.3 kJ/mol and a boiling point of 106.5°C. Determine the vapor pressure of tetramethylbutane on a very hot summer day when the temperature is 38°C.

Accepted Answer

A)  80.0 torr 
B)  36.7 torr 
C)  67.8 torr 
D)  47.9 torr 
E)  89.3 torr 
A)  80.0 torr 
B)  36.7 torr 
C)  67.8 torr 
D)  47.9 torr 
E)  89.3 torr

Question 7

Coulomb's law states that the energy of attraction between ions depends ________

Accepted Answer

A)  only on the charge of the cation. 
B)  only on the charge of the anion. 
C)  directly on the distance between the ions. 
D)  on the charges of both ions. 
E)  on the temperature. 
A)  only on the charge of the cation. 
B)  only on the charge of the anion. 
C)  directly on the distance between the ions. 
D)  on the charges of both ions. 
E)  on the temperature.

Question 8

A hydration sphere forms around an ion in aqueous solution due to ________

Accepted Answer

A)  ion-dipole interactions. 
B)  ion-hydrogen-bonding interactions. 
C)  dispersion forces. 
D)  dipole-dipole interactions. 
E)  ion-induced dipole interactions. 
A)  ion-dipole interactions. 
B)  ion-hydrogen-bonding interactions. 
C)  dispersion forces. 
D)  dipole-dipole interactions. 
E)  ion-induced dipole interactions.

Question 9

The vapor pressure of a liquid will increase if ________

Accepted Answer

A)  the temperature is increased. 
B)  the volume available to the gas phase is increased. 
C)  the volume of the liquid phase is increased. 
D)  the liquid is stirred. 
E)  the liquid is put in a container with a larger surface area. 
A)  the temperature is increased. 
B)  the volume available to the gas phase is increased. 
C)  the volume of the liquid phase is increased. 
D)  the liquid is stirred. 
E)  the liquid is put in a container with a larger surface area.

Question 10

Point c in the phase diagram below is the ________

Accepted Answer

A)  critical point. 
B)  triple point. 
C)  transition point. 
D)  normal freezing point. 
E)  normal boiling point. 
A)  critical point. 
B)  triple point. 
C)  transition point. 
D)  normal freezing point. 
E)  normal boiling point.

Question 11

Consider the phase diagram for a substance shown here. The line between the solid and liquid phases has a positive slope because the solid phase is ________ than the liquid phase.

Accepted Answer

A)  more dense 
B)  less dense 
C)  more massive 
D)  less massive 
E)  hotter 
A)  more dense 
B)  less dense 
C)  more massive 
D)  less massive 
E)  hotter

Question 12

Which of the following substances is a solid at 25°C and 1 atm?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 13

The relative energies (strengths) of the intermolecular forces present in each of four different pure gases are shown in the figure below. Which gas will show the smallest deviation from ideal gas behavior?

Accepted Answer

A)  a 
B)  b 
C)  c 
D)  d 
A)  a 
B)  b 
C)  c 
D)  d

Question 14

The density of water decreases as it is cooled from 4.0°C to freezing because ________

Accepted Answer

A)  water molecules decrease in size as they cool because energy is released. 
B)  a network of hydrogen bonds between water molecules is formed. 
C)  water molecules become more rigid as they cool. 
D)  hydrogen bonds in liquid water are longer than they are in ice. 
E)  all substances contract just before freezing. 
A)  water molecules decrease in size as they cool because energy is released. 
B)  a network of hydrogen bonds between water molecules is formed. 
C)  water molecules become more rigid as they cool. 
D)  hydrogen bonds in liquid water are longer than they are in ice. 
E)  all substances contract just before freezing.

Question 15

A phase diagram shows the states of a substance as a function of ________ and ________.

Accepted Answer

A)  pressure; volume 
B)  volume; temperature 
C)  pressure; temperature 
D)  concentration; temperature 
E)  density; pressure 
A)  pressure; volume 
B)  volume; temperature 
C)  pressure; temperature 
D)  concentration; temperature 
E)  density; pressure

Question 16

Dispersion forces are due to ________

Accepted Answer

A)  permanent dipoles. 
B)  temporary dipoles. 
C)  hydrogen bonding. 
D)  ionic interactions. 
E)  protons. 
A)  permanent dipoles. 
B)  temporary dipoles. 
C)  hydrogen bonding. 
D)  ionic interactions. 
E)  protons.

Question 17

Which statement about the phase diagram below is not correct?

Accepted Answer

A)  The critical point is not shown. 
B)  D is the normal boiling point. 
C)  The vapor pressure of the solid is zero below the triple point. 
D)  The normal melting point is at a lower temperature than the triple point. 
E)  E, F, and G label in that order the solid, liquid, and gas phases. 
A)  The critical point is not shown. 
B)  D is the normal boiling point. 
C)  The vapor pressure of the solid is zero below the triple point. 
D)  The normal melting point is at a lower temperature than the triple point. 
E)  E, F, and G label in that order the solid, liquid, and gas phases.

Question 18

Gasoline is primarily a mixture of hydrocarbons and is sold with an octane rating that is based on a comparison with the properties of isooctane (C8H18), which has an enthalpy of vaporization of 35.8 kJ/mol and a boiling point of 98.2°C. Determine the vapor pressure of isooctane on a very hot summer day when the temperature is 38°C.

Accepted Answer

A)  80.0 torr 
B)  36.7 torr 
C)  67.8 torr 
D)  47.9 torr 
E)  89.3 torr 
A)  80.0 torr 
B)  36.7 torr 
C)  67.8 torr 
D)  47.9 torr 
E)  89.3 torr

Question 19

The relative energies (strengths) of the intermolecular forces between four different substances are shown in the figure below. Which substance has the lowest boiling point?

Accepted Answer

A)  a 
B)  b 
C)  c 
D)  d 
A)  a 
B)  b 
C)  c 
D)  d

Question 20

Why do the strengths of dispersion interactions generally increase with the molar mass of the compound?

Accepted Answer

A molecule with the larger molar mass ha

Which of the following compounds would be most soluble in carbon tetrachloride, CCl₄?

Arrange the following compounds in order of increasing dispersion interactions: CCl₄, CH₄, C₃H₈.

The relative energies (strengths) of the intermolecular forces present in each of four different pure substances are shown in the figure below. Which substance has the highest melting point?

At the critical point, ________

Describe the utility of the Clausius-Clapeyron equation.

Coulomb's law states that the energy of attraction between ions depends ________

A hydration sphere forms around an ion in aqueous solution due to ________

The vapor pressure of a liquid will increase if ________

Point c in the phase diagram below is the ________

Consider the phase diagram for a substance shown here. The line between the solid and liquid phases has a positive slope because the solid phase is ________ than the liquid phase.

Which of the following substances is a solid at 25°C and 1 atm?

The relative energies (strengths) of the intermolecular forces present in each of four different pure gases are shown in the figure below. Which gas will show the smallest deviation from ideal gas behavior?

The density of water decreases as it is cooled from 4.0°C to freezing because ________

A phase diagram shows the states of a substance as a function of and .

Dispersion forces are due to ________

Which statement about the phase diagram below is not correct?

The relative energies (strengths) of the intermolecular forces between four different substances are shown in the figure below. Which substance has the lowest boiling point?

Why do the strengths of dispersion interactions generally increase with the molar mass of the compound?

Matter and Energy: The Origin of the Universe

Atoms, Ions, and Molecules: Matter Starts Here

Stoichiometry: Mass, Formulas, and Reactions

Solution Chemistry: The Hydrosphere

Thermochemistry: Energy Changes in Reactions

Properties of Gases: the Air We Breathe

A Quantum Model of Atoms: Waves and Particles

Chemical Bonds: What Makes a Gas a Greenhouse Gas

Molecular Geometry: Shape Determines Function

Solutions: Properties and Behavior

Solids: Structures and Applications

Organic Chemistry: Fuels, Pharmaceuticals, Materials, and Life

Chemical Kinetics: Reactions in the Air We Breathe

Chemical Equilibrium: How Much Product Does a Reaction Really Make

Acid-Base and Solubility Equilibria: Reactions in Soil and Water

Metal Ions: Colorful and Essential

Thermodynamics: Spontaneous and Nonspontaneous Reactions and Processes

Electrochemistry: the Quest for Clean Energy

Biochemistry: the Compounds of Life

Nuclear Chemistry: Applications to Energy and Medicine

Life and the Periodic Table

Filters

Exam 10: Intermolecular Forces: The Uniqueness of Water

Which of the following compounds would be most soluble in carbon tetrachloride, CCl4?

Arrange the following compounds in order of increasing dispersion interactions: CCl4, CH4, C3H8.

The relative energies (strengths) of the intermolecular forces present in each of four different pure substances are shown in the figure below. Which substance has the highest melting point?

At the critical point, ________

Describe the utility of the Clausius-Clapeyron equation.

Coulomb's law states that the energy of attraction between ions depends ________

A hydration sphere forms around an ion in aqueous solution due to ________

The vapor pressure of a liquid will increase if ________

Point c in the phase diagram below is the ________

Consider the phase diagram for a substance shown here. The line between the solid and liquid phases has a positive slope because the solid phase is ________ than the liquid phase.

Which of the following substances is a solid at 25°C and 1 atm?

The relative energies (strengths) of the intermolecular forces present in each of four different pure gases are shown in the figure below. Which gas will show the smallest deviation from ideal gas behavior?

The density of water decreases as it is cooled from 4.0°C to freezing because ________

A phase diagram shows the states of a substance as a function of ________ and ________.

Dispersion forces are due to ________

Which statement about the phase diagram below is not correct?

The relative energies (strengths) of the intermolecular forces between four different substances are shown in the figure below. Which substance has the lowest boiling point?

Why do the strengths of dispersion interactions generally increase with the molar mass of the compound?

Matter and Energy: The Origin of the Universe

Atoms, Ions, and Molecules: Matter Starts Here

Stoichiometry: Mass, Formulas, and Reactions

Solution Chemistry: The Hydrosphere

Thermochemistry: Energy Changes in Reactions

Properties of Gases: the Air We Breathe

A Quantum Model of Atoms: Waves and Particles

Chemical Bonds: What Makes a Gas a Greenhouse Gas

Molecular Geometry: Shape Determines Function

Solutions: Properties and Behavior

Solids: Structures and Applications

Organic Chemistry: Fuels, Pharmaceuticals, Materials, and Life

Chemical Kinetics: Reactions in the Air We Breathe

Chemical Equilibrium: How Much Product Does a Reaction Really Make

Acid-Base and Solubility Equilibria: Reactions in Soil and Water

Metal Ions: Colorful and Essential

Thermodynamics: Spontaneous and Nonspontaneous Reactions and Processes

Electrochemistry: the Quest for Clean Energy

Biochemistry: the Compounds of Life

Nuclear Chemistry: Applications to Energy and Medicine

Life and the Periodic Table

Filters

Which of the following compounds would be most soluble in carbon tetrachloride, CCl₄?

Arrange the following compounds in order of increasing dispersion interactions: CCl₄, CH₄, C₃H₈.

A phase diagram shows the states of a substance as a function of and .