Question 1

What is the predominant intermolecular force in CBr4?

Accepted Answer

A) London-dispersion forces 
B) ion-dipole attraction 
C) ionic bonding 
D) dipole-dipole attraction 
E) hydrogen-bonding 
A) London-dispersion forces 
B) ion-dipole attraction 
C) ionic bonding 
D) dipole-dipole attraction 
E) hydrogen-bonding

Question 2

Based on the figure above, the boiling point of water under an external pressure of 0.493 atm is __________°C.

Accepted Answer

A) 80 
B) 40 
C) 60 
D) 70 
E) 90 
A) 80 
B) 40 
C) 60 
D) 70 
E) 90

Question 3

The intermolecular force(s)responsible for the fact that CH4 has the lowest boiling point in the set CH4, SiH4, GeH4, SnH4 is/are __________.

Accepted Answer

A) hydrogen bonding 
B) dipole-dipole interactions 
C) London dispersion forces 
D) mainly hydrogen bonding but also dipole-dipole interactions 
E) mainly London-dispersion forces but also dipole-dipole interactions 
A) hydrogen bonding 
B) dipole-dipole interactions 
C) London dispersion forces 
D) mainly hydrogen bonding but also dipole-dipole interactions 
E) mainly London-dispersion forces but also dipole-dipole interactions

Question 4

Which type of liquid crystal is colored and changes color with temperature?

Accepted Answer

A) nematic 
B) smectic A 
C) cholesteric 
D) smectic B 
E) smectic C 
A) nematic 
B) smectic A 
C) cholesteric 
D) smectic B 
E) smectic C

Question 5

Which statements about viscosity are true? (i)Viscosity increases as temperature decreases.
(ii)Viscosity increases as molecular weight increases.
(iii)Viscosity increases as intermolecular forces increase.

Accepted Answer

A) (i)only 
B) (ii)and (iii) 
C) (i)and (iii) 
D) none 
E) all 
A) (i)only 
B) (ii)and (iii) 
C) (i)and (iii) 
D) none 
E) all

Question 6

Which one of the following exhibits dipole-dipole attraction between molecules?

Accepted Answer

A) XeF4 
B) AsH3 
C) CO2 
D) BCl3 
E) Cl2 
A) XeF4 
B) AsH3 
C) CO2 
D) BCl3 
E) Cl2

Question 7

The heating curve shown was generated by measuring the heat flow and temperature for a solid as it was heated. The slope of the __________ segment corresponds to the heat capacity of the gas.

Accepted Answer

A) AB 
B) BC 
C) CD 
D) DE 
E) EF 
A) AB 
B) BC 
C) CD 
D) DE 
E) EF

Question 8

Which one of the following substances will not have hydrogen bonding as one of its intermolecular forces?

Accepted Answer

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

Question 9

The heating curve shown was generated by measuring the heat flow and temperature for a solid as it was heated. The slope of the __________ segment corresponds to the heat capacity of the solid.

Accepted Answer

A) AB 
B) BC 
C) CD 
D) DE 
E) EF 
A) AB 
B) BC 
C) CD 
D) DE 
E) EF

Question 10

Ethanol (C2H5OH)melts at -114°C. The enthalpy of fusion is 5.02 kJ/mol. The specific heats of solid and liquid ethanol are 0.97 J/g-K and 2.3 J/g-K, respectively. How much heat (kJ)is needed to convert 25.0 g of solid ethanol at -135°C to liquid ethanol at -50°C?

Accepted Answer

A) 207.3 
B) -12.7 
C) 6.91 
D) 4192 
E) 9.21 
A) 207.3 
B) -12.7 
C) 6.91 
D) 4192 
E) 9.21

Question 11

In the __________ liquid crystalline phase, the component molecules exhibit only one dimensional ordering.

Accepted Answer

A) nematic 
B) smectic A 
C) smectic B 
D) smectic C 
E) cholesteric 
A) nematic 
B) smectic A 
C) smectic B 
D) smectic C 
E) cholesteric

Question 12

Viscosity is __________.

Accepted Answer

A) the "skin" on a liquid surface caused by intermolecular attraction 
B) the resistance to flow 
C) the same as density 
D) inversely proportional to molar mass 
E) unaffected by temperature 
A) the "skin" on a liquid surface caused by intermolecular attraction 
B) the resistance to flow 
C) the same as density 
D) inversely proportional to molar mass 
E) unaffected by temperature

Question 13

On the phase diagram shown above, segment __________ corresponds to the conditions of temperature and pressure under which the solid and the gas of the substance are in equilibrium.

Accepted Answer

A) AB 
B) AC 
C) AD 
D) CD 
E) BC 
A) AB 
B) AC 
C) AD 
D) CD 
E) BC

Question 14

Which one of the following should have the lowest boiling point?

Accepted Answer

A) CH3OH 
B) H2S 
C) NH3 
D) HCl 
E) CH4 
A) CH3OH 
B) H2S 
C) NH3 
D) HCl 
E) CH4

Question 15

Of the following substances, __________ has the highest boiling point.

Accepted Answer

A) H2O 
B) CO2 
C) CH4 
D) Kr 
E) NH3 
A) H2O 
B) CO2 
C) CH4 
D) Kr 
E) NH3

Question 16

Together, liquids and solids constitute __________ phases of matter.

Accepted Answer

A) the compressible 
B) the fluid 
C) the condensed 
D) all of the 
E) the disordered 
A) the compressible 
B) the fluid 
C) the condensed 
D) all of the 
E) the disordered

Question 17

The heating curve shown was generated by measuring the heat flow and temperature for a solid as it was heated. The slope of the __________ segment corresponds to the heat capacity of the liquid of the substance.

Accepted Answer

A) AB 
B) BC 
C) CD 
D) DE 
E) EF 
A) AB 
B) BC 
C) CD 
D) DE 
E) EF

Question 18

The heating curve shown was generated by measuring the heat flow and temperature of a solid as it was heated. The heat flow into the sample in the segment __________ will yield the value of the ΔHvap of this substance.

Accepted Answer

A) AB 
B) BC 
C) CD 
D) DE 
E) EF 
A) AB 
B) BC 
C) CD 
D) DE 
E) EF

Question 19

The heating curve shown was generated by measuring the heat flow and temperature of a solid as it was heated. The heat flow into the sample in the segment __________ will yield the value of the ΔHfusion of this substance.

Accepted Answer

A) AB 
B) BC 
C) CD 
D) DE 
E) EF 
A) AB 
B) BC 
C) CD 
D) DE 
E) EF

Question 20

For a given substance that exhibits liquid-crystalline properties, the liquid-crystalline state exists __________.

Accepted Answer

A) at one particular temperature below the melting point of the solid 
B) in a range of temperatures below the melting point of the solid 
C) at one particular temperature above the melting point of the solid 
D) in a range of temperatures above the melting point of the solid 
E) in a range of temperatures from below the melting point to above the melting point 
A) at one particular temperature below the melting point of the solid 
B) in a range of temperatures below the melting point of the solid 
C) at one particular temperature above the melting point of the solid 
D) in a range of temperatures above the melting point of the solid 
E) in a range of temperatures from below the melting point to above the melting point

Exam 11: Liquids and Intermolecular Forces

What is the predominant intermolecular force in CBr4?

Based on the figure above, the boiling point of water under an external pressure of 0.493 atm is __________°C.

The intermolecular force(s)responsible for the fact that CH4 has the lowest boiling point in the set CH4, SiH4, GeH4, SnH4 is/are __________.

Which type of liquid crystal is colored and changes color with temperature?

Which statements about viscosity are true? (i)Viscosity increases as temperature decreases. (ii)Viscosity increases as molecular weight increases. (iii)Viscosity increases as intermolecular forces increase.

Which one of the following exhibits dipole-dipole attraction between molecules?

The heating curve shown was generated by measuring the heat flow and temperature for a solid as it was heated. The slope of the __________ segment corresponds to the heat capacity of the gas.

Which one of the following substances will not have hydrogen bonding as one of its intermolecular forces?

The heating curve shown was generated by measuring the heat flow and temperature for a solid as it was heated. The slope of the __________ segment corresponds to the heat capacity of the solid.

Ethanol (C2H5OH)melts at -114°C. The enthalpy of fusion is 5.02 kJ/mol. The specific heats of solid and liquid ethanol are 0.97 J/g-K and 2.3 J/g-K, respectively. How much heat (kJ)is needed to convert 25.0 g of solid ethanol at -135°C to liquid ethanol at -50°C?

In the __________ liquid crystalline phase, the component molecules exhibit only one dimensional ordering.

Viscosity is __________.

On the phase diagram shown above, segment __________ corresponds to the conditions of temperature and pressure under which the solid and the gas of the substance are in equilibrium.

Which one of the following should have the lowest boiling point?

Of the following substances, __________ has the highest boiling point.

Together, liquids and solids constitute __________ phases of matter.

The heating curve shown was generated by measuring the heat flow and temperature for a solid as it was heated. The slope of the __________ segment corresponds to the heat capacity of the liquid of the substance.

The heating curve shown was generated by measuring the heat flow and temperature of a solid as it was heated. The heat flow into the sample in the segment __________ will yield the value of the ΔHvap of this substance.

The heating curve shown was generated by measuring the heat flow and temperature of a solid as it was heated. The heat flow into the sample in the segment __________ will yield the value of the ΔHfusion of this substance.

For a given substance that exhibits liquid-crystalline properties, the liquid-crystalline state exists __________.

Introduction: Matter and Measurement

Atoms, Molecules, and Ions

Stoichiometry: Calculations With Chemical Formulas and Equations

Aqueous Reactions and Solution Stoichiometry

Thermochemistry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Molecular Geometry and Bonding Theories

Gases

Solids and Modern Materials

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Aqueous Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Chemistry of the Nonmetals

Transition Metals and Coordination Chemistry

The Chemistry of Life: Organic and Biological Chemistry

Filters

What is the predominant intermolecular force in CBr₄?

The intermolecular force(s)responsible for the fact that CH₄ has the lowest boiling point in the set CH₄, SiH₄, GeH₄, SnH₄ is/are __________.

Ethanol (C₂H₅OH)melts at -114°C. The enthalpy of fusion is 5.02 kJ/mol. The specific heats of solid and liquid ethanol are 0.97 J/g-K and 2.3 J/g-K, respectively. How much heat (kJ)is needed to convert 25.0 g of solid ethanol at -135°C to liquid ethanol at -50°C?

The heating curve shown was generated by measuring the heat flow and temperature of a solid as it was heated. The heat flow into the sample in the segment __________ will yield the value of the ΔH_vap of this substance.

The heating curve shown was generated by measuring the heat flow and temperature of a solid as it was heated. The heat flow into the sample in the segment __________ will yield the value of the ΔH_fusion of this substance.