Question 1

Which has the smallest dipole-dipole forces?

Accepted Answer

A)  CH3Cl  
B)  HBr  
C)  O2 
D)  NO  
A)  CH3Cl  
B)  HBr  
C)  O2 
D)  NO

Question 2

Which substance below has the strongest intermolecular forces?

Accepted Answer

A)  A2X, ΔHvap= 39.6 kJ/mol 
B)  BY2, ΔHvap= 26.7 kJ/mol 
C)  C3X2, ΔHvap= 36.4 kJ/mol 
D)  DX2, ΔHvap= 23.3 kJ/mol 
E)  EY3, ΔHvap= 21.5 kJ/mol 
A)  A2X, ΔHvap= 39.6 kJ/mol 
B)  BY2, ΔHvap= 26.7 kJ/mol 
C)  C3X2, ΔHvap= 36.4 kJ/mol 
D)  DX2, ΔHvap= 23.3 kJ/mol 
E)  EY3, ΔHvap= 21.5 kJ/mol

Question 3

Place the following compounds in order of decreasing strength of intermolecular forces. I.CH3CH2CH2CH2CH2CH3 II.(CH3)3CCH3 III.(CH3)3CCH2CH3

Accepted Answer

A)  III > II > I 
B)  I > III > II 
C)  I > II > III 
D)  II > III > I 
E)  III > I > II 
A)  III > II > I 
B)  I > III > II 
C)  I > II > III 
D)  II > III > I 
E)  III > I > II

Question 4

Identify the place which has the highest boiling point of water.

Accepted Answer

A)  Death Valley, 282 feet below sea level 
B)  a pressurized passenger jet, 35,000 feet 
C)  New Orleans, sea level 
D)  Mt. Everest, 29035 feet 
E)  Denver, Colorado, 5280 feet 
A)  Death Valley, 282 feet below sea level 
B)  a pressurized passenger jet, 35,000 feet 
C)  New Orleans, sea level 
D)  Mt. Everest, 29035 feet 
E)  Denver, Colorado, 5280 feet

Question 5

Consider the phase diagram shown.What is the normal freezing point?

Accepted Answer

A)  31°C 
B)  -56.7 °C 
C)  -78.5 °C 
D)  0°C 
E)  100°C 
A)  31°C 
B)  -56.7 °C 
C)  -78.5 °C 
D)  0°C 
E)  100°C

Question 6

Choose the pair of substances that are most likely to form a homogeneous solution.

Accepted Answer

A)  CBr4 and SF2 
B)  NF3 and SO2 
C)  CO and C6H6 
D)  NH2CH3 and CH4 
E)  None of the pairs above will form a homogeneous solution. 
A)  CBr4 and SF2 
B)  NF3 and SO2 
C)  CO and C6H6 
D)  NH2CH3 and CH4 
E)  None of the pairs above will form a homogeneous solution.

Question 7

Identify the substance with the highest viscosity.

Accepted Answer

A)  gasoline 
B)  water 
C)  maple syrup 
D)  soda 
E)  coffee 
A)  gasoline 
B)  water 
C)  maple syrup 
D)  soda 
E)  coffee

Question 8

The melting point of water is

Accepted Answer

A)  32oF 
B)  32oC 
C)  212oC 
D)  100°C 
E)  273°C 
A)  32oF 
B)  32oC 
C)  212oC 
D)  100°C 
E)  273°C

Question 9

At atmospheric pressure,dry ice

Accepted Answer

A)  freezes. 
B)  deposits. 
C)  sublimes. 
D)  melts. 
E)  boils. 
A)  freezes. 
B)  deposits. 
C)  sublimes. 
D)  melts. 
E)  boils.

Question 10

Identify the compound that has hydrogen bonding.

Accepted Answer

A)  (CH3)3N 
B)  N2 
C)  CH3CH3 
D)  HI 
E)  H2O  
A)  (CH3)3N 
B)  N2 
C)  CH3CH3 
D)  HI 
E)  H2O

Question 11

The heat of vaporization of water at 100°C is 40.66 kJ/mol.Calculate the quantity of heat that is absorbed/released when 9.00 g of steam condenses to liquid water at 100°C.

Accepted Answer

A)  20.3 kJ of heat are absorbed. 
B)  20.3 kJ of heat are released. 
C)  81.3 kJ of heat are absorbed. 
D)  81.3 kJ of heat are released. 
A)  20.3 kJ of heat are absorbed. 
B)  20.3 kJ of heat are released. 
C)  81.3 kJ of heat are absorbed. 
D)  81.3 kJ of heat are released.

Question 12

At atmospheric pressure,ice

Accepted Answer

A)  freezes. 
B)  deposits. 
C)  sublimes. 
D)  melts. 
E)  boils. 
A)  freezes. 
B)  deposits. 
C)  sublimes. 
D)  melts. 
E)  boils.

Question 13

Place the following substances in order of decreasing boiling point. He Rn H2

Accepted Answer

A)  He > H2 > Rn 
B)  H2 > He > Rn 
C)  H2 > Rn > He 
D)  He > Rn > H2 
E)  Rn > H2 > He 
A)  He > H2 > Rn 
B)  H2 > He > Rn 
C)  H2 > Rn > He 
D)  He > Rn > H2 
E)  Rn > H2 > He

Question 14

Which of the following statements is TRUE?

Accepted Answer

A)  Vapor pressure increases with temperature. 
B)  Hydrogen bonds are stronger than covalent bonds. 
C)  Intermolecular forces hold the atoms in molecules together. 
D)  Dispersion forces are generally stronger than dipole-dipole forces. 
E)  None of the above are true. 
A)  Vapor pressure increases with temperature. 
B)  Hydrogen bonds are stronger than covalent bonds. 
C)  Intermolecular forces hold the atoms in molecules together. 
D)  Dispersion forces are generally stronger than dipole-dipole forces. 
E)  None of the above are true.

Question 15

List the compounds in decreasing boiling point order. CH3CH2CH3 Ar CH3CN

Accepted Answer

A)  CH3CH2CH3 > CH3CN > Ar 
B)  Ar > CH3CH2CH3 > CH3CN 
C)  CH3CH2CH3 > Ar > CH3CN 
D)  CH3CN > CH3CH2CH3 > Ar 
E)  Ar > CH3CN > CH3CH2CH3 
A)  CH3CH2CH3 > CH3CN > Ar 
B)  Ar > CH3CH2CH3 > CH3CN 
C)  CH3CH2CH3 > Ar > CH3CN 
D)  CH3CN > CH3CH2CH3 > Ar 
E)  Ar > CH3CN > CH3CH2CH3

Question 16

In which of the following substances should hydrogen bonding contribute to the attractive interactions in the molecules?

Accepted Answer

A)  CF4 
B)  HI 
C)  H2Se 
D)  N(CH3)3 
E)  None of the above 
A)  CF4 
B)  HI 
C)  H2Se 
D)  N(CH3)3 
E)  None of the above

Question 17

Place the following substances in order of increasing boiling point. Ne I2 N2

Accepted Answer

A)  Ne 2 2 
B)  I2 2 2 2 2 2 
E)  Ne 2 2 
A)  Ne 2 2 
B)  I2 2 2 2 2 2 
E)  Ne 2 2

Question 18

What is the strongest type of intermolecular force present in CHBr3?

Accepted Answer

A)  ion-dipole 
B)  dispersion 
C)  hydrogen bonding 
D)  dipole-dipole 
E)  none of the above 
A)  ion-dipole 
B)  dispersion 
C)  hydrogen bonding 
D)  dipole-dipole 
E)  none of the above

Question 19

Choose the substance with the lowest surface tension.

Accepted Answer

A)  CH3OH 
B)  CH3CH2CH2CH3 
C)  C6H6 
D)  H2O 
E)  (CH3)2CO 
A)  CH3OH 
B)  CH3CH2CH2CH3 
C)  C6H6 
D)  H2O 
E)  (CH3)2CO

Question 20

What is the strongest type of intermolecular force present in NH2CH3?

Accepted Answer

A)  dispersion 
B)  dipole-dipole 
C)  hydrogen bonding 
D)  ion-dipole 
E)  none of the above 
A)  dispersion 
B)  dipole-dipole 
C)  hydrogen bonding 
D)  ion-dipole 
E)  none of the above

Exam 12: Liquids, Solids, and Intermolecular Forces

Which has the smallest dipole-dipole forces?

Which substance below has the strongest intermolecular forces?

Place the following compounds in order of decreasing strength of intermolecular forces. I.CH3CH2CH2CH2CH2CH3 II.(CH3)3CCH3 III.(CH3)3CCH2CH3

Identify the place which has the highest boiling point of water.

Consider the phase diagram shown.What is the normal freezing point?

Choose the pair of substances that are most likely to form a homogeneous solution.

Identify the substance with the highest viscosity.

The melting point of water is

At atmospheric pressure,dry ice

Identify the compound that has hydrogen bonding.

The heat of vaporization of water at 100°C is 40.66 kJ/mol.Calculate the quantity of heat that is absorbed/released when 9.00 g of steam condenses to liquid water at 100°C.

At atmospheric pressure,ice

Place the following substances in order of decreasing boiling point. He Rn H2

Which of the following statements is TRUE?

List the compounds in decreasing boiling point order. CH3CH2CH3 Ar CH3CN

In which of the following substances should hydrogen bonding contribute to the attractive interactions in the molecules?

Place the following substances in order of increasing boiling point. Ne I2 N2

What is the strongest type of intermolecular force present in CHBr3?

Choose the substance with the lowest surface tension.

What is the strongest type of intermolecular force present in NH2CH3?

Essentials: Units, Measurements, and Problem Solving

Atoms

The Quantum Mechanical Model of the Atom

Periodic Properties of the Elements

Molecules and Compounds

Chemical Bonding I

Chemical Bonding Ii

Chemical Reactions and Chemical Quantities

Introduction to Solutions and Aqueous Reactions

Thermochemistry

Gases

Crystalline Solids and Modern Materials

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry

Transition Metals and Coordination Compounds

Filters

Place the following compounds in order of decreasing strength of intermolecular forces. I.CH₃CH₂CH₂CH₂CH₂CH₃ II.(CH₃)₃CCH₃ III.(CH₃)₃CCH₂CH₃

Place the following substances in order of decreasing boiling point. He Rn H₂

List the compounds in decreasing boiling point order. CH₃CH₂CH₃ Ar CH₃CN

Place the following substances in order of increasing boiling point. Ne I₂N₂

What is the strongest type of intermolecular force present in CHBr₃?

What is the strongest type of intermolecular force present in NH₂CH₃?