Question 1

Use the graph of vapor pressure to determine the normal boiling point of O2.

Accepted Answer

A) 92 K 
B) 90 K 
C) 88 K 
D) 84 K 
E) O2 doesn't boil because it is always a gas. 
A) 92 K 
B) 90 K 
C) 88 K 
D) 84 K 
E) O2 doesn't boil because it is always a gas. B

Question 2

Given the following compound and its boiling point, identify whether it is polar or nonpolar: H2S, -60.7°C.

Accepted Answer

polar

Question 3

What phase exists at the point labeled a?

Accepted Answer

solid

Question 4

The molecular property related to the ease with which the electron density in a neutral atom or molecule can be distorted is called

Accepted Answer

A) a dipole moment. 
B) polarizability. 
C) a dispersion force. 
D) surface tension. 
E) a van der Waals force. 
A) a dipole moment. 
B) polarizability. 
C) a dispersion force. 
D) surface tension. 
E) a van der Waals force.

Question 5

How much enthalpy is necessary to heat 10.0 g of solid benzene (C6H6)at 0.0°C to benzene vapor at 100°C?

Accepted Answer

Question 6

Given that the heat of vaporization of diethyl ether is 26.0 kJ/mol and the vapor pressure of diethyl ether is 440 torr at 20.°C, calculate the normal boiling point of diethyl ether.

Accepted Answer

36°C (the

Question 7

Based on the phase diagram shown below, how will the melting point of the substance change if the pressure is increased above 1 atm?

Accepted Answer

A) The melting point will decrease. 
B) The melting point will remain the same. 
C) The melting point will increase. 
D) The substance will not melt at pressures of 1 atm and above; instead, the solid sublimes to form the gas phase. 
A) The melting point will decrease. 
B) The melting point will remain the same. 
C) The melting point will increase. 
D) The substance will not melt at pressures of 1 atm and above; instead, the solid sublimes to form the gas phase.

Question 8

Indicate all the types of intermolecular forces of attraction in C2H6(g).

Accepted Answer

Question 9

Ethanol (C2H5 - OH)will have a greater viscosity than ethylene glycol (HO - CH2CH2 - OH)at the same temperature.

Accepted Answer

A) True 
 B)False

Question 10

Identify the dominant (strongest)type of intermolecular force present in NH3(l).

Accepted Answer

Question 11

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

Accepted Answer

The answer of Of the pair of compounds given, which...

Question 12

The number of atoms in a body-centered cubic unit cell is

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 8 
A) 1 
B) 2 
C) 3 
D) 4 
E) 8

Question 13

Based on the phase diagram shown below, which is more dense: the liquid phase or the solid phase?

Accepted Answer

the solid

Question 14

Indicate all the types of intermolecular forces of attraction in F2(l).

Accepted Answer

Question 15

Which of the following liquids would have the highest viscosity at 25°C?

Accepted Answer

A) CH3OCH3 
B) CH2Cl2 
C) C2H5OH 
D) CH3Br 
E) HOCH2CH2OH 
A) CH3OCH3 
B) CH2Cl2 
C) C2H5OH 
D) CH3Br 
E) HOCH2CH2OH

Question 16

Of the pair of compounds given, which would have the stronger intermolecular forces of attraction?
H2S or H2Se

Accepted Answer

Question 17

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

Accepted Answer

A) CBr4 
B) CBr3F 
C) CBr2F2 
D) CBrF3 
E) CF4 
A) CBr4 
B) CBr3F 
C) CBr2F2 
D) CBrF3 
E) CF4

Question 18

The vapor pressure of ethanol is 400 mmHg at 63.5°C. Its molar heat of vaporization is 39.3 kJ/mol. What is vapor pressure of ethanol, in mmHg, at 34.9°C?

Accepted Answer

A) 1,510 mmHg 
B) 100 mmHg 
C) 200 mmHg 
D) 0.0099 mmHg 
E) 4.61 mmHg 
A) 1,510 mmHg 
B) 100 mmHg 
C) 200 mmHg 
D) 0.0099 mmHg 
E) 4.61 mmHg

Question 19

The zincblende structure of ZnS has the relatively large sulfide ions arranged at the lattice points of a face-centered cubic structure. The edge length of this cubic unit cell is 540.9 pm.Determine the density of zincblende.

Accepted Answer

A) 3.081 g/cm3 
B) 1.023 g/cm3 
C) 4.091 g/cm3 
D) 2.046 g/cm3 
E) 2.032 g/cm3 
A) 3.081 g/cm3 
B) 1.023 g/cm3 
C) 4.091 g/cm3 
D) 2.046 g/cm3 
E) 2.032 g/cm3

Question 20

MgO has the same crystal structure as NaCl, face-centered cubic.How many oxide ions surround each Mg2+ ion as nearest neighbors?

Accepted Answer

A) 4 
B) 6 
C) 8 
D) 10 
E) 12 
A) 4 
B) 6 
C) 8 
D) 10 
E) 12

Exam 11: Intermolecular Forces and Liquids and Solids

Use the graph of vapor pressure to determine the normal boiling point of O2.

Given the following compound and its boiling point, identify whether it is polar or nonpolar: H2S, -60.7°C.

What phase exists at the point labeled a?

The molecular property related to the ease with which the electron density in a neutral atom or molecule can be distorted is called

How much enthalpy is necessary to heat 10.0 g of solid benzene (C6H6)at 0.0°C to benzene vapor at 100°C?

Given that the heat of vaporization of diethyl ether is 26.0 kJ/mol and the vapor pressure of diethyl ether is 440 torr at 20.°C, calculate the normal boiling point of diethyl ether.

Based on the phase diagram shown below, how will the melting point of the substance change if the pressure is increased above 1 atm?

Indicate all the types of intermolecular forces of attraction in C2H6(g).

Ethanol (C2H5 - OH)will have a greater viscosity than ethylene glycol (HO - CH2CH2 - OH)at the same temperature.

Identify the dominant (strongest)type of intermolecular force present in NH3(l).

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

The number of atoms in a body-centered cubic unit cell is

Based on the phase diagram shown below, which is more dense: the liquid phase or the solid phase?

Indicate all the types of intermolecular forces of attraction in F2(l).

Which of the following liquids would have the highest viscosity at 25°C?

Of the pair of compounds given, which would have the stronger intermolecular forces of attraction? H2S or H2Se

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

The vapor pressure of ethanol is 400 mmHg at 63.5°C. Its molar heat of vaporization is 39.3 kJ/mol. What is vapor pressure of ethanol, in mmHg, at 34.9°C?

The zincblende structure of ZnS has the relatively large sulfide ions arranged at the lattice points of a face-centered cubic structure. The edge length of this cubic unit cell is 540.9 pm.Determine the density of zincblende.

MgO has the same crystal structure as NaCl, face-centered cubic.How many oxide ions surround each Mg2+ ion as nearest neighbors?

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

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Use the graph of vapor pressure to determine the normal boiling point of O₂.

Given the following compound and its boiling point, identify whether it is polar or nonpolar: H₂S, -60.7°C.

How much enthalpy is necessary to heat 10.0 g of solid benzene (C₆H₆)at 0.0°C to benzene vapor at 100°C?

Indicate all the types of intermolecular forces of attraction in C₂H₆(g).

Ethanol (C₂H₅ - OH)will have a greater viscosity than ethylene glycol (HO - CH₂CH₂ - OH)at the same temperature.

Identify the dominant (strongest)type of intermolecular force present in NH₃(l).

Indicate all the types of intermolecular forces of attraction in F₂(l).

Of the pair of compounds given, which would have the stronger intermolecular forces of attraction? H₂S or H₂Se

MgO has the same crystal structure as NaCl, face-centered cubic.How many oxide ions surround each Mg²⁺ ion as nearest neighbors?