Question 1

What phase exists at the point labeled b?

Accepted Answer

The answer of What phase exists at the point labeled...

Question 2

Which of the responses includes all of the following that can form hydrogen bonds with water molecules? (1)Na+ (2)CH3COOH (3)C2H6 (4)CH3NH2

Accepted Answer

A) (1)and (2) 
B) (1)and (3) 
C) (2)and (3) 
D) (2)and (4) 
E) (3)and (4) 
A) (1)and (2) 
B) (1)and (3) 
C) (2)and (3) 
D) (2)and (4) 
E) (3)and (4)

Question 3

Which liquid is expected to have the larger surface tension at a given temperature, CCl4 or H2O? Briefly explain.

Accepted Answer

Water would have the

Question 4

Which of the following substances should have the highest boiling point?

Accepted Answer

A) CH4 
B) Cl2 
C) Kr 
D) CH3Cl 
E) N2 
A) CH4 
B) Cl2 
C) Kr 
D) CH3Cl 
E) N2

Question 5

Use the graph of vapor pressure to determine the normal boiling point of CHCl3.

Accepted Answer

A) 19°C 
B) 52°C 
C) 60°C 
D) 64°C 
E) 70°C 
A) 19°C 
B) 52°C 
C) 60°C 
D) 64°C 
E) 70°C

Question 6

Suppose the atoms in a two-dimensional crystal have the following arrangement:   What is the coordination number of each atom in this crystal?

Accepted Answer

The answer of Suppose the atoms in a two-dimensional crystal...

Question 7

The molar enthalpy of vaporization of hexane (C6H14)is 28.9 kJ/mol, and its normal boiling point is 68.73°C. What is the vapor pressure of hexane at 25°C?

Accepted Answer

A) 171 torr 
B) 4.44 torr 
C) 117 torr 
D) 3370 torr 
E) 759 torr 
A) 171 torr 
B) 4.44 torr 
C) 117 torr 
D) 3370 torr 
E) 759 torr

Question 8

Of the pair of compounds given, which would have the stronger intermolecular forces of attraction?
CH4 or CH3OH

Accepted Answer

Question 9

Indicate all the types of intermolecular forces of attraction in SF4(g).

Accepted Answer

dipole-dip

Question 10

Of the pair of compounds given, which would have the stronger intermolecular forces of attraction?
NH3 or PH3

Accepted Answer

Question 11

Which of the following is not true with regard to water?

Accepted Answer

A) Water has a high heat capacity. 
B) Water has an unusually high boiling point. 
C) Water can form hydrogen bonds. 
D) Ice is more dense than liquid water. 
E) Water is a polar molecule. 
A) Water has a high heat capacity. 
B) Water has an unusually high boiling point. 
C) Water can form hydrogen bonds. 
D) Ice is more dense than liquid water. 
E) Water is a polar molecule.

Question 12

Silver metal crystallizes in a face-centered cubic lattice with L as the length of one edge of the unit cube. The center-to-center distance between nearest silver atoms is

Accepted Answer

A) L/2 
B)    
C) 2L 
D)    
E) None of the above. 
A) L/2 
B)    
C) 2L 
D)    
E) None of the above.

Question 13

Which of the following characteristics indicates the presence of weak intermolecular forces in a liquid?

Accepted Answer

A) a low heat of vaporization 
B) a high critical temperature 
C) a low vapor pressure 
D) a high boiling point 
E) None of the above. 
A) a low heat of vaporization 
B) a high critical temperature 
C) a low vapor pressure 
D) a high boiling point 
E) None of the above.

Question 14

Octane, C8H18, boils at 125°C as compared to water, which boils at 100°C. This information suggests that the dispersion forces in nonpolar octane molecules are stronger than dispersion forces and hydrogen bonding in water.

Accepted Answer

A) True 
 B)False

Question 15

The vapor pressure of a liquid in a closed container depends upon

Accepted Answer

A) the amount of liquid. 
B) the surface area of the liquid. 
C) the volume of the container. 
D) the temperature. 
E) None of the above. 
A) the amount of liquid. 
B) the surface area of the liquid. 
C) the volume of the container. 
D) the temperature. 
E) None of the above.

Question 16

The normal boiling point of bromine is 58.8°C. Given that the vapor pressure of bromine is 75.0 torr at 2.5°C, calculate the molar enthalpy of vaporization of bromine.

Accepted Answer

A) 3.76 kJ/mol 
B) 31.3 kJ/mol 
C) 2.90 kJ/mol 
D) 3.57 kJ/mol 
E) 29.7 kJ/mol 
A) 3.76 kJ/mol 
B) 31.3 kJ/mol 
C) 2.90 kJ/mol 
D) 3.57 kJ/mol 
E) 29.7 kJ/mol

Question 17

The normal boiling point of methanol (CH3OH)is 64.6°C. Given that the vapor pressure of methanol is 75.0 torr at 15.2°C, calculate the molar enthalpy of vaporization of methanol.

Accepted Answer

A) 0.383 kJ/mol 
B) 3.00 kJ/mol 
C) 38.0 kJ/mol 
D) 27.5 kJ/mol 
E) 74.7 kJ/mol 
A) 0.383 kJ/mol 
B) 3.00 kJ/mol 
C) 38.0 kJ/mol 
D) 27.5 kJ/mol 
E) 74.7 kJ/mol

Question 18

Given the following liquids and their boiling points, which has the highest vapor pressure at its normal boiling point?

Accepted Answer

A) ethanol, bp = 78°C 
B) methanol, bp = 65°C 
C) water, bp = 100°C 
D) benzene, bp = 80°C 
E) The vapor pressure of each of the liquids at its normal boiling point would be the same. 
A) ethanol, bp = 78°C 
B) methanol, bp = 65°C 
C) water, bp = 100°C 
D) benzene, bp = 80°C 
E) The vapor pressure of each of the liquids at its normal boiling point would be the same.

Question 19

Of the given pair of compounds, which would have the higher boiling point?
H2Se or H2O

Accepted Answer

Question 20

Of the pair of compounds given, which would have the stronger intermolecular forces of attraction?
SF4 or C10H22

Accepted Answer

Exam 11: Intermolecular Forces and Liquids and Solids

What phase exists at the point labeled b?

Which of the responses includes all of the following that can form hydrogen bonds with water molecules? (1)Na+ (2)CH3COOH (3)C2H6 (4)CH3NH2

Which liquid is expected to have the larger surface tension at a given temperature, CCl4 or H2O? Briefly explain.

Which of the following substances should have the highest boiling point?

Use the graph of vapor pressure to determine the normal boiling point of CHCl3.

Suppose the atoms in a two-dimensional crystal have the following arrangement: What is the coordination number of each atom in this crystal?

The molar enthalpy of vaporization of hexane (C6H14)is 28.9 kJ/mol, and its normal boiling point is 68.73°C. What is the vapor pressure of hexane at 25°C?

Of the pair of compounds given, which would have the stronger intermolecular forces of attraction? CH4 or CH3OH

Indicate all the types of intermolecular forces of attraction in SF4(g).

Of the pair of compounds given, which would have the stronger intermolecular forces of attraction? NH3 or PH3

Which of the following is not true with regard to water?

Silver metal crystallizes in a face-centered cubic lattice with L as the length of one edge of the unit cube. The center-to-center distance between nearest silver atoms is

Which of the following characteristics indicates the presence of weak intermolecular forces in a liquid?

Octane, C8H18, boils at 125°C as compared to water, which boils at 100°C. This information suggests that the dispersion forces in nonpolar octane molecules are stronger than dispersion forces and hydrogen bonding in water.

The vapor pressure of a liquid in a closed container depends upon

The normal boiling point of bromine is 58.8°C. Given that the vapor pressure of bromine is 75.0 torr at 2.5°C, calculate the molar enthalpy of vaporization of bromine.

The normal boiling point of methanol (CH3OH)is 64.6°C. Given that the vapor pressure of methanol is 75.0 torr at 15.2°C, calculate the molar enthalpy of vaporization of methanol.

Given the following liquids and their boiling points, which has the highest vapor pressure at its normal boiling point?

Of the given pair of compounds, which would have the higher boiling point? H2Se or H2O

Of the pair of compounds given, which would have the stronger intermolecular forces of attraction? SF4 or C10H22

Chemistry: The Study of Change

Atoms, Molecules, and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solution

Gases

Thermo-Chemistry

Quantum Theory and the Electronic Structure of Atoms

Periodic Relationships Among the Elements

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Molecular Geometry and Hybridization of Atomic Orbitals

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Chemistry in the Atmosphere

Entropy, Free Energy, and Equilibrium

Electrochemistry

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Transition Metal Chemistry and Coordination Compounds

Nuclear Chemistry

Organic Chemistry

Synthetic and Natural Organic Polymers

Filters

Which of the responses includes all of the following that can form hydrogen bonds with water molecules? (1)Na⁺ (2)CH₃COOH (3)C₂H₆ (4)CH₃NH₂

Which liquid is expected to have the larger surface tension at a given temperature, CCl₄ or H₂O? Briefly explain.

Use the graph of vapor pressure to determine the normal boiling point of CHCl₃.

The molar enthalpy of vaporization of hexane (C₆H₁₄)is 28.9 kJ/mol, and its normal boiling point is 68.73°C. What is the vapor pressure of hexane at 25°C?

Of the pair of compounds given, which would have the stronger intermolecular forces of attraction? CH₄ or CH₃OH

Indicate all the types of intermolecular forces of attraction in SF₄(g).

Of the pair of compounds given, which would have the stronger intermolecular forces of attraction? NH₃ or PH₃

Octane, C₈H₁₈, boils at 125°C as compared to water, which boils at 100°C. This information suggests that the dispersion forces in nonpolar octane molecules are stronger than dispersion forces and hydrogen bonding in water.

The normal boiling point of methanol (CH₃OH)is 64.6°C. Given that the vapor pressure of methanol is 75.0 torr at 15.2°C, calculate the molar enthalpy of vaporization of methanol.

Of the given pair of compounds, which would have the higher boiling point? H₂Se or H₂O

Of the pair of compounds given, which would have the stronger intermolecular forces of attraction? SF₄ or C₁₀H₂₂