Question 1

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 2

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 3

Which of the following would be expected to have the highest vapor pressure at room temperature?

Accepted Answer

A) ethanol, bp = 78°C 
B) methanol, bp = 65°C 
C) water, bp = 100°C 
D) acetone, bp = 56°C 
A) ethanol, bp = 78°C 
B) methanol, bp = 65°C 
C) water, bp = 100°C 
D) acetone, bp = 56°C

Question 4

Indicate all the types of intermolecular forces of attraction in SO2(l).

Accepted Answer

dipole-dip

Question 5

The intermolecular forces present in CO include which of the following? I.dipole-dipole
II.ion-dipole
III.dispersion
IV.hydrogen bonding

Accepted Answer

A) I, II, III, and IV 
B) I and III 
C) I, III, and IV 
D) I and II 
E) II and IV 
A) I, II, III, and IV 
B) I and III 
C) I, III, and IV 
D) I and II 
E) II and IV

Question 6

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

Accepted Answer

hydrogen b

Question 7

Which one of the following substances crystallizes as a molecular solid?

Accepted Answer

A) KI 
B) SiO2 
C) Sn 
D) CH3OH 
E) Al2(SO4)3 
A) KI 
B) SiO2 
C) Sn 
D) CH3OH 
E) Al2(SO4)3

Question 8

Arrange the following in order of increasing boiling point: RbCl, CH3Cl, CH3OH, CH4.

Accepted Answer

A) CH3OH 3Cl 4 
B) CH3OH 4 3Cl 3Cl 3OH 4 
D) CH4 3OH 3Cl 4 3Cl 3OH < RbCl 
A) CH3OH 3Cl 4 
B) CH3OH 4 3Cl 3Cl 3OH 4 
D) CH4 3OH 3Cl 4 3Cl 3OH < RbCl

Question 9

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

Accepted Answer

Question 10

Indicate all the types of intermolecular forces of attraction in CF4(g).

Accepted Answer

Question 11

The boiling points of chloromethane (CH3Cl)and dichlormethane (CH2Cl2)are - 24 °C and 40.°C respectively.The boiling point of trichloromethane (CHCl3)is predicted to be:

Accepted Answer

A) 40.°C C) > - 24 °C and < 40.°C D) - 24 °C E) 40.°C A) 40.°C C) > - 24 °C and < 40.°C D) - 24 °C E) 40.°C

Question 12

The most space efficient arrangement of spheres is found in which type(s)of atom arrangement? I.hexagonal close-packed
II.cubic close-packed
III.simple cubic
IV.body-centered cubic

Accepted Answer

A) I only 
B) II only 
C) I and II 
D) IV only 
E) I, II, and IV 
A) I only 
B) II only 
C) I and II 
D) IV only 
E) I, II, and IV

Question 13

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

Question 14

Which would have the stronger intermolecular forces of attraction HF or HCl?

Accepted Answer

The answer of Which would have the stronger intermolecular forces...

Question 15

The shape of the water-to-glass meniscus results from the strong adhesive forces between glass and water.

Accepted Answer

A) True 
 B)False

Question 16

Find the temperature at which ethanol boils on a day in the mountains when the barometric pressure is 547 mmHg.(Given: The heat of vaporization of ethanol is 39.3 kJ/mol; the normal boiling point of ethanol is 78.3°C.)

Accepted Answer

A) 10.0°C 
B) 69.9°C 
C) 74.6°C 
D) 76.5°C 
E) 77.9°C 
A) 10.0°C 
B) 69.9°C 
C) 74.6°C 
D) 76.5°C 
E) 77.9°C

Question 17

Which one of the following substances should exhibit hydrogen bonding in the liquid state?

Accepted Answer

A) SiH4 
B) H2 
C) H2S 
D) CH4 
E) CH3NH2 
A) SiH4 
B) H2 
C) H2S 
D) CH4 
E) CH3NH2

Question 18

Polyethylene plastic consists of long chains of carbon atoms, each of which is also bonded to hydrogens as shown below:   Water forms beads when placed on a polyethylene surface.Why?

Accepted Answer

Water is highly polar and poly

Question 19

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

Accepted Answer

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

Question 20

Use the following data to determine the molar heat of vaporization of chlorine.

Accepted Answer

A) 34,700 J 
B) 21,900 J 
C) 9.99 kJ 
D) 712 J 
E) 317 J 
A) 34,700 J 
B) 21,900 J 
C) 9.99 kJ 
D) 712 J 
E) 317 J

Exam 11: Intermolecular Forces and Liquids and Solids

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

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

Which of the following would be expected to have the highest vapor pressure at room temperature?

Indicate all the types of intermolecular forces of attraction in SO2(l).

The intermolecular forces present in CO include which of the following? I.dipole-dipole II.ion-dipole III.dispersion IV.hydrogen bonding

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

Which one of the following substances crystallizes as a molecular solid?

Arrange the following in order of increasing boiling point: RbCl, CH3Cl, CH3OH, CH4.

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

Indicate all the types of intermolecular forces of attraction in CF4(g).

The boiling points of chloromethane (CH3Cl)and dichlormethane (CH2Cl2)are - 24 °C and 40.°C respectively.The boiling point of trichloromethane (CHCl3)is predicted to be:

The most space efficient arrangement of spheres is found in which type(s)of atom arrangement? I.hexagonal close-packed II.cubic close-packed III.simple cubic IV.body-centered cubic

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

Which would have the stronger intermolecular forces of attraction HF or HCl?

The shape of the water-to-glass meniscus results from the strong adhesive forces between glass and water.

Find the temperature at which ethanol boils on a day in the mountains when the barometric pressure is 547 mmHg.(Given: The heat of vaporization of ethanol is 39.3 kJ/mol; the normal boiling point of ethanol is 78.3°C.)

Which one of the following substances should exhibit hydrogen bonding in the liquid state?

Polyethylene plastic consists of long chains of carbon atoms, each of which is also bonded to hydrogens as shown below: Water forms beads when placed on a polyethylene surface.Why?

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

Use the following data to determine the molar heat of vaporization of chlorine.

Chemistry: the Study of Change

Atoms, Molecules, and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Gases

Thermochemistry

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

Entropy Free Energy and Equilibrium

Electrochemistry

Nuclear Chemistry

Chemistry in the Atmosphere

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Transition Metal Chemistry and Coordination Compounds

Organic Chemistry

Synthetic and Natural Organic Polymers

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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 SO₂(l).

Arrange the following in order of increasing boiling point: RbCl, CH₃Cl, CH₃OH, CH₄.

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

Indicate all the types of intermolecular forces of attraction in CF₄(g).

The boiling points of chloromethane (CH₃Cl)and dichlormethane (CH₂Cl₂)are - 24 °C and 40.°C respectively.The boiling point of trichloromethane (CHCl₃)is predicted to be:

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

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