Question 1

Which of the following is usually the weakest intermolecular interaction in small molecules?

Accepted Answer

A)  Covalent bonding 
B)  Dipole-dipole interactions 
C)  London dispersion forces 
D)  Hydrogen bonding 
A)  Covalent bonding 
B)  Dipole-dipole interactions 
C)  London dispersion forces 
D)  Hydrogen bonding

Question 2

The temperature of a 6.5 L sample of a gas at constant pressure is 50°C. Calculate the temperature when the volume of the gas sample increases to 6.8 L.

Accepted Answer

A)  358°C 
B)  338°C 
C)  358 K 
D)  338 K 
A)  358°C 
B)  338°C 
C)  358 K 
D)  338 K

Question 3

What will happen when the temperature of a gas is decreased from 60°C to 30°C at constant pressure?

Accepted Answer

A)  The volume of the gas will double. 
B)  The volume of the gas will decrease by half. 
C)  The volume of the gas will decrease slightly. 
D)  The volume of the gas will increase slightly. 
A)  The volume of the gas will double. 
B)  The volume of the gas will decrease by half. 
C)  The volume of the gas will decrease slightly. 
D)  The volume of the gas will increase slightly.

Question 4

Which physical state of matter is represented by the following model?

Accepted Answer

A)  solid 
B)  liquid 
C)  gas 
A)  solid 
B)  liquid 
C)  gas

Question 5

What is solidification?

Accepted Answer

A)  It is the change of a substance from the liquid state to the solid state. 
B)  It is the change of a substance from the gaseous state to the liquid state. 
C)  It is the change of a substance from the liquid state to the gaseous state. 
D)  It is the change of a substance from the solid state to the liquid state. 
A)  It is the change of a substance from the liquid state to the solid state. 
B)  It is the change of a substance from the gaseous state to the liquid state. 
C)  It is the change of a substance from the liquid state to the gaseous state. 
D)  It is the change of a substance from the solid state to the liquid state.

Question 6

Which of the following is a mathematical representation of Gay-Lussac's law?

Accepted Answer

A)  P1/V2 = P2/V1 
B)  P1/V1 = P2/V2 
C)  P1/T2 = P2/T1 
D)  P1/T1 = P2/T2 
A)  P1/V2 = P2/V1 
B)  P1/V1 = P2/V2 
C)  P1/T2 = P2/T1 
D)  P1/T1 = P2/T2

Question 7

Which of the following molecules cannot engage in hydrogen bonding?

Accepted Answer

A)  SiH4 
B)  PH3 
C)  H2S 
D)  all of these 
A)  SiH4 
B)  PH3 
C)  H2S 
D)  all of these

Question 8

Which of the following pairs does not engage in hydrogen bonding?

Accepted Answer

A)  H2O and NH3 
B)  H2O and H2O 
C)  NH3 and NH3 
D)  They all engage in hydrogen bonding. 
A)  H2O and NH3 
B)  H2O and H2O 
C)  NH3 and NH3 
D)  They all engage in hydrogen bonding.

Question 9

If a 7-g sample of molecular nitrogen occupies 2.50 L at 10°C, calculate the pressure of the sample.

Accepted Answer

A)  1.28 atm 
B)  2.32 atm 
C)  2.56 atm 
D)  4.65 atm 
A)  1.28 atm 
B)  2.32 atm 
C)  2.56 atm 
D)  4.65 atm

Question 10

Which of the following laws relates the pressure and the temperature of a gas when volume is kept constant?

Accepted Answer

A)  Boyle's law 
B)  Charles's law 
C)  Dalton's law 
D)  Gay-Lussac's law 
A)  Boyle's law 
B)  Charles's law 
C)  Dalton's law 
D)  Gay-Lussac's law

Question 11

What is condensation?

Accepted Answer

A)  It is the change of a substance from the liquid state to the gaseous state. 
B)  It is the change of a substance from the solid state to the liquid state. 
C)  It is the change of a substance from the liquid state to the solid state. 
D)  It is the change of a substance from the gaseous state to the liquid state. 
A)  It is the change of a substance from the liquid state to the gaseous state. 
B)  It is the change of a substance from the solid state to the liquid state. 
C)  It is the change of a substance from the liquid state to the solid state. 
D)  It is the change of a substance from the gaseous state to the liquid state.

Question 12

Which of the following pairs engages in hydrogen bonding?

Accepted Answer

A)  water with acetone (CH3COCH3) 
B)  water with butane (CH3CH2CH2CH3) 
C)  water with acetone (CH3COCH3) and water with butane (CH3CH2CH2CH3) 
D)  neither of these 
A)  water with acetone (CH3COCH3) 
B)  water with butane (CH3CH2CH2CH3) 
C)  water with acetone (CH3COCH3) and water with butane (CH3CH2CH2CH3) 
D)  neither of these

Question 13

Chloroform has a normal boiling point of 61.7°C. Which of the following is true?

Accepted Answer

A)  At any temperature, the vapor pressure of chloroform is greater than that of water. 
B)  Chloroform is less volatile than water. 
C)  At any temperature, the vapor pressure of chloroform is greater than that of water and chloroform is less volatile than water. 
D)  None of these are true. 
A)  At any temperature, the vapor pressure of chloroform is greater than that of water. 
B)  Chloroform is less volatile than water. 
C)  At any temperature, the vapor pressure of chloroform is greater than that of water and chloroform is less volatile than water. 
D)  None of these are true.

Question 14

A vessel containing CO2 and H2O has a pressure of 2.502 atm. The partial pressure of CO2 is 1.980 atm. Calculate the partial pressure of H2O in the vessel.

Accepted Answer

A)  0.522 atm 
B)  0.955 atm 
C)  1.204 atm 
D)  4.482 atm 
A)  0.522 atm 
B)  0.955 atm 
C)  1.204 atm 
D)  4.482 atm

Question 15

Which of the following molecules can have only London dispersion forces?

Accepted Answer

A)  CH4 
B)  CO 
C)  Both CH4 and CO 
D)  Neither CH4 or CO 
A)  CH4 
B)  CO 
C)  Both CH4 and CO 
D)  Neither CH4 or CO

Question 16

If an 8-g sample of molecular oxygen at 1.00 atm pressure occupies 3.00 L, calculate the temperature of the sample.

Accepted Answer

A)  146°C 
B)  146 K 
C)  73°C 
D)  73 K 
A)  146°C 
B)  146 K 
C)  73°C 
D)  73 K

Question 17

Which of the following factors is affected by hydrogen bonding in molecules?

Accepted Answer

A)  the boiling point of water 
B)  the expansion of water upon freezing 
C)  the boiling point of water and the expansion of water upon freezing 
D)  neither the boiling point of water or the expansion of water upon freezing 
A)  the boiling point of water 
B)  the expansion of water upon freezing 
C)  the boiling point of water and the expansion of water upon freezing 
D)  neither the boiling point of water or the expansion of water upon freezing

Question 18

Which of the following is the correct unit for the ideal gas law constant, R?

Accepted Answer

A)  L/mol 
B)  L·atm−1·mol 
C)  L·atm·mol−1·K−1 
D)  L·atm·mol·K 
A)  L/mol 
B)  L·atm−1·mol 
C)  L·atm·mol−1·K−1 
D)  L·atm·mol·K

Question 19

Which of the following laws relates the volume and the pressure of a gas when temperature is kept constant?

Accepted Answer

A)  Avogadro's law 
B)  Boyle's law 
C)  Charles's law 
D)  Dalton's law 
A)  Avogadro's law 
B)  Boyle's law 
C)  Charles's law 
D)  Dalton's law

Question 20

Which of the following influences the strength of London dispersion forces?

Accepted Answer

A)  the number of electrons 
B)  the size of molecules 
C)  the shape of molecules 
D)  all of these 
A)  the number of electrons 
B)  the size of molecules 
C)  the shape of molecules 
D)  all of these

Exam 5: Gases, Liquids, and Solids

Which of the following is usually the weakest intermolecular interaction in small molecules?

The temperature of a 6.5 L sample of a gas at constant pressure is 50°C. Calculate the temperature when the volume of the gas sample increases to 6.8 L.

What will happen when the temperature of a gas is decreased from 60°C to 30°C at constant pressure?

Which physical state of matter is represented by the following model?

What is solidification?

Which of the following is a mathematical representation of Gay-Lussac's law?

Which of the following molecules cannot engage in hydrogen bonding?

Which of the following pairs does not engage in hydrogen bonding?

If a 7-g sample of molecular nitrogen occupies 2.50 L at 10°C, calculate the pressure of the sample.

Which of the following laws relates the pressure and the temperature of a gas when volume is kept constant?

What is condensation?

Which of the following pairs engages in hydrogen bonding?

Chloroform has a normal boiling point of 61.7°C. Which of the following is true?

A vessel containing CO2 and H2O has a pressure of 2.502 atm. The partial pressure of CO2 is 1.980 atm. Calculate the partial pressure of H2O in the vessel.

Which of the following molecules can have only London dispersion forces?

If an 8-g sample of molecular oxygen at 1.00 atm pressure occupies 3.00 L, calculate the temperature of the sample.

Which of the following factors is affected by hydrogen bonding in molecules?

Which of the following is the correct unit for the ideal gas law constant, R?

Which of the following laws relates the volume and the pressure of a gas when temperature is kept constant?

Which of the following influences the strength of London dispersion forces?

Matter, Energy, and Measurement

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Chemical Bonds

Chemical Reactions

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Reaction Rates and Chemical Equilibrium

Acids and Bases

Nuclear Chemistry

Organic Chemistry

Alkanes

Alkenes, Alkynes, and Aromatic Compounds

Alcohols, Ethers, and Thiols

Chirality: the Handedness of Molecules

Amines

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Carboxylic Acids

Carboxylic Anhydrides, Esters, and Amides

Carbohydrates

Lipids

Proteins

Enzymes

Chemical Communications: Neurotransmitters and Hormones

Nucleotides, Nucleic Acids, and Heredity

Gene Expression and Protein Synthesis

Bioenergetics: How the Body Converts Food to Energy

Specific Catabolic Pathways: Carbohydrate, Lipid, and Protein Metabolism

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A vessel containing CO₂ and H₂O has a pressure of 2.502 atm. The partial pressure of CO₂ is 1.980 atm. Calculate the partial pressure of H₂O in the vessel.