Question 1

Place the following substances in order of decreasing boiling point. H2O  F2 CO

Accepted Answer

A)  CO > H2O > F2 
B)  F2 > CO  > H2O 
C)  H2O > CO  > F2 
D)  CO > F2 > H2O 
E)  F2 > H2O > CO  
A)  CO > H2O > F2 
B)  F2 > CO  > H2O 
C)  H2O > CO  > F2 
D)  CO > F2 > H2O 
E)  F2 > H2O > CO

Question 2

Place the following compounds in order of increasing strength of intermolecular forces. CH4 CH3(CH2)3CH3 CH3CH3

Accepted Answer

A)  CH3(CH2)3CH3 4  3CH3 
B)  CH3(CH2)3CH3 3CH3 4 
C)  CH3CH3 4  3(CH2)3CH3 
D)  CH4 3(CH2)3CH3 3CH3 
E)  CH4 3CH3 3(CH2)3CH3 
A)  CH3(CH2)3CH3 4  3CH3 
B)  CH3(CH2)3CH3 3CH3 4 
C)  CH3CH3 4  3(CH2)3CH3 
D)  CH4 3(CH2)3CH3 3CH3 
E)  CH4 3CH3 3(CH2)3CH3

Question 3

How much energy must be removed from a 94.4 g sample of benzene (molar mass = 78.11 g/mol)at 322.0 K to solidify the sample and lower the temperature to 205.0 K? The following physical data may be useful.
ΔHvap = 33.9 kJ/mol
ΔHfus = 9.8 kJ/mol
Cliq = 1.73 J/g°C
Cgas = 1.06 J/g°C
Csol = 1.51 J/g°C
Tmelting = 279.0 K
Tboiling = 353.0 K

Accepted Answer

A)  17.6 kJ 
B)  11.8 kJ 
C)  70.2 kJ 
D)  10.5 kJ 
E)  29.4 kJ 
A)  17.6 kJ 
B)  11.8 kJ 
C)  70.2 kJ 
D)  10.5 kJ 
E)  29.4 kJ

Question 4

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= 32.5 kJ/mol 
D)  DX2, ΔHvap= 23.3 kJ/mol 
E)  EY3, ΔHvap= 21.6 kJ/mol 
A)  A2X, ΔHvap= 39.6 kJ/mol 
B)  BY2, ΔHvap= 26.7 kJ/mol 
C)  C3X2, ΔHvap= 32.5 kJ/mol 
D)  DX2, ΔHvap= 23.3 kJ/mol 
E)  EY3, ΔHvap= 21.6 kJ/mol

Question 5

What is the strongest type of intermolecular force present in CHCl3?

Accepted Answer

A)  ion-dipole 
B)  dispersion 
C)  hydrogen bonding 
D)  dipole-dipole 
E)  ionic bonds 
A)  ion-dipole 
B)  dispersion 
C)  hydrogen bonding 
D)  dipole-dipole 
E)  ionic bonds

Question 6

A molecule contains hydrogen bonding if it contains hydrogen covalently bonded to

Accepted Answer

A)  fluorine, oxygen, or nitrogen. 
B)  chlorine, fluorine, or iodine. 
C)  sulfur, oxygen, or fluorine. 
D)  oxygen or nitrogen. 
E)  nitrogen, fluorine, oxygen, or nitrogen. 
A)  fluorine, oxygen, or nitrogen. 
B)  chlorine, fluorine, or iodine. 
C)  sulfur, oxygen, or fluorine. 
D)  oxygen or nitrogen. 
E)  nitrogen, fluorine, oxygen, or nitrogen.

Question 7

Choose the substance with the highest boiling point.

Accepted Answer

A)  CH4 
B)  NaBr 
C)  CS2 
D)  HF 
E)  F2 
A)  CH4 
B)  NaBr 
C)  CS2 
D)  HF 
E)  F2

Question 8

Consider the phase diagram shown.Choose the statement below that is TRUE.

Accepted Answer

A)  The triple point of this substance occurs at a temperature of 32°C. 
B)  At 13 atm of pressure, there is no temperature where the gas phase of this substance would exist. 
C)  The solid phase of this substance is higher in density than the liquid phase. 
D)  The line separating the solid and liquid phases represents the ΔHvap. 
E)  None of the above is true. 
A)  The triple point of this substance occurs at a temperature of 32°C. 
B)  At 13 atm of pressure, there is no temperature where the gas phase of this substance would exist. 
C)  The solid phase of this substance is higher in density than the liquid phase. 
D)  The line separating the solid and liquid phases represents the ΔHvap. 
E)  None of the above is true.

Question 9

Choose the substance with the lowest vapor pressure at a given temperature.

Accepted Answer

A)  CO2 
B)  BeBr2 
C)  BF3 
D)  He 
E)  PF5 
A)  CO2 
B)  BeBr2 
C)  BF3 
D)  He 
E)  PF5

Question 10

Place the following substances in order of increasing vapor pressure at a given temperature. NF3 NH3 BCl3

Accepted Answer

A)  NH3 3 3 
B)  NF3 3 3 
C)  BCl3 3 3 
D)  NH3 3  3 
E)  BCl3 3 3 
A)  NH3 3 3 
B)  NF3 3 3 
C)  BCl3 3 3 
D)  NH3 3  3 
E)  BCl3 3 3

Question 11

In DNA,adenine and thymine have ________ hydrogen bonds between them.

Accepted Answer

A)  4 
B)  0 
C)  1 
D)  3 
E)  2 
A)  4 
B)  0 
C)  1 
D)  3 
E)  2

Question 12

Assign the appropriate labels to the phase diagram shown below.

Accepted Answer

A)  A = liquid, B = solid, C = gas, D = critical point 
B)  A = gas, B = solid, C = liquid, D = triple point 
C)  A = gas, B = liquid, C = solid, D = critical point 
D)  A = solid, B = gas, C = liquid, D = critical point 
E)  A = liquid, B = gas, C = solid, D = triple point 
A)  A = liquid, B = solid, C = gas, D = critical point 
B)  A = gas, B = solid, C = liquid, D = triple point 
C)  A = gas, B = liquid, C = solid, D = critical point 
D)  A = solid, B = gas, C = liquid, D = critical point 
E)  A = liquid, B = gas, C = solid, D = triple point

Question 13

Identify the compound with the highest dipole moment.

Accepted Answer

A)  CH3OCH3 
B)  CH3CH2CH3 
C)  CH3CHO 
D)  (CH3)2O 
E)  CH3CN 
A)  CH3OCH3 
B)  CH3CH2CH3 
C)  CH3CHO 
D)  (CH3)2O 
E)  CH3CN

Question 14

Why does the temperature of a substance stay constant during a phase change such as vaporization?

Accepted Answer

The energy added to the substance is not

Question 15

Fresh vegetables with high water content do not freeze well.Explain.

Accepted Answer

A)  Water expands when it freezes and damages the cell wall. 
B)  Water contracts when it freezes and damages the cell wall. 
C)  Water expands when it freezes and does not damage the cell wall. 
D)  Water contracts when it freezes and does not damage the cell wall. 
E)  Water does not change in size when it freezes. 
A)  Water expands when it freezes and damages the cell wall. 
B)  Water contracts when it freezes and damages the cell wall. 
C)  Water expands when it freezes and does not damage the cell wall. 
D)  Water contracts when it freezes and does not damage the cell wall. 
E)  Water does not change in size when it freezes.

Question 16

Which one of the following has a low density?

Accepted Answer

A)  gas 
B)  liquid 
C)  solid 
D)  none of the above 
E)  all of the above 
A)  gas 
B)  liquid 
C)  solid 
D)  none of the above 
E)  all of the above

Question 17

In liquid methanol, CH3OH       
Which intermolecular forces are present?

Accepted Answer

A)  Dispersion, hydrogen bonding and dipole-dipole forces are present. 
B)  Only dipole-dipole and hydrogen bonding forces are present. 
C)  Only dispersion and ion-dipole forces are present. 
D)  Only hydrogen bonding forces are present. 
A)  Dispersion, hydrogen bonding and dipole-dipole forces are present. 
B)  Only dipole-dipole and hydrogen bonding forces are present. 
C)  Only dispersion and ion-dipole forces are present. 
D)  Only hydrogen bonding forces are present.

Question 18

What is the strongest type of intermolecular force present in F2?

Accepted Answer

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

Question 19

Consider the phase diagram below.If the dashed line at 1 atm of pressure is followed from 80 to 350°C,what phase changes will occur (in order of increasing temperature)?

Accepted Answer

A)  condensation, followed by sublimation 
B)  sublimation, followed by fusion 
C)  vaporization, followed by deposition 
D)  fusion, followed by vaporization 
E)  No phase change will occur under the conditions specified. 
A)  condensation, followed by sublimation 
B)  sublimation, followed by fusion 
C)  vaporization, followed by deposition 
D)  fusion, followed by vaporization 
E)  No phase change will occur under the conditions specified.

Question 20

Define critical point.

Accepted Answer

A)  The temperature and pressure above which a supercritical fluid exists. 
B)  The temperature and pressure where liquid, solid, and gas are equally stable and are in equilibrium. 
C)  The temperature and pressure below which a supercritical fluid exists. 
D)  The temperature and pressure are equal. 
E)  The temperature and pressure are not equal. 
A)  The temperature and pressure above which a supercritical fluid exists. 
B)  The temperature and pressure where liquid, solid, and gas are equally stable and are in equilibrium. 
C)  The temperature and pressure below which a supercritical fluid exists. 
D)  The temperature and pressure are equal. 
E)  The temperature and pressure are not equal.

Exam 11: Liquids,solids,and Intermolecular Forces

Place the following substances in order of decreasing boiling point. H2O F2 CO

Place the following compounds in order of increasing strength of intermolecular forces. CH4 CH3(CH2)3CH3 CH3CH3

Which substance below has the strongest intermolecular forces?

What is the strongest type of intermolecular force present in CHCl3?

A molecule contains hydrogen bonding if it contains hydrogen covalently bonded to

Choose the substance with the highest boiling point.

Consider the phase diagram shown.Choose the statement below that is TRUE.

Choose the substance with the lowest vapor pressure at a given temperature.

Place the following substances in order of increasing vapor pressure at a given temperature. NF3 NH3 BCl3

In DNA,adenine and thymine have ________ hydrogen bonds between them.

Assign the appropriate labels to the phase diagram shown below.

Identify the compound with the highest dipole moment.

Why does the temperature of a substance stay constant during a phase change such as vaporization?

Fresh vegetables with high water content do not freeze well.Explain.

Which one of the following has a low density?

In liquid methanol, CH3OH Which intermolecular forces are present?

What is the strongest type of intermolecular force present in F2?

Consider the phase diagram below.If the dashed line at 1 atm of pressure is followed from 80 to 350°C,what phase changes will occur (in order of increasing temperature)?

Define critical point.

Matter, measurement, and Problem Solving

Atoms and Elements

Molecules,compounds,and Chemical Equations

Chemical Quantities and Aqueous Reactions

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding Ii: Molecular Shapes,valence Bond Theory,

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

Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

Filters

Place the following substances in order of decreasing boiling point. H₂O F₂ CO

Place the following compounds in order of increasing strength of intermolecular forces. CH₄ CH₃(CH₂)₃CH₃ CH₃CH₃

What is the strongest type of intermolecular force present in CHCl₃?

Place the following substances in order of increasing vapor pressure at a given temperature. NF₃ NH₃BCl₃

In liquid methanol, CH₃OH Which intermolecular forces are present?

What is the strongest type of intermolecular force present in F₂?