Question 1

What is the intermolecular force that exists between a magnesium ion and hydrogen sulfide?

Accepted Answer

A)  dipole-dipole forces
B)  London dispersion forces
C)  ionic bonding
D)  ion-dipole forces
E)  ion-ion forcesF) All of the above
G) A) and E)

Question 2

Which arrow represents the process of vaporization?

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) B) and C)
G) A) and B)

Question 3

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

Accepted Answer

A)  1.
B)  2.
C)  3.
D)  4.
E)  8.F) None of the above
G) A) and B)

Question 4

If liquid bromine is cooled to form a solid,which type of solid does it form?

Accepted Answer

A)  atomic
B)  metallic
C)  molecular
D)  ionic
E)  covalentF) A) and B)
G) C) and D)

Question 5

Platinum has a face-centered cubic crystal structure and a density of 21.5 g/cm3.What is the radius of a platinum atom?

Accepted Answer

A)  69 pm
B)  98 pm
C)  139 pm
D)  196 pm
E)  277 pmF) A) and E)
G) A) and D)

Question 6

Ionic crystals are composed of charged spheres that are held together by covalent bonds.

Accepted Answer

A) True 
 B)False

Question 7

Give an example of an ionic crystal and a metallic crystal which contain an element common to each.

Accepted Answer

NaCl = ion...

Question 8

What is the name given for the attraction between unlike molecules involved in capillary action?

Accepted Answer

A)  Adhesion
B)  Ionization
C)  Cohesion
D)  Surface tension
E)  ViscosityF) A) and D)
G) B) and C)

Question 9

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 10

A face-centered crystal lattice has one atom in the center of the unit cell.

Accepted Answer

A) True 
 B)False

Question 11

Octane is a component of fuel used in internal combustion engines.The dominant intermolecular forces in octane are

Accepted Answer

A)  dipole-dipole forces.
B)  London dispersion forces.
C)  hydrogen bonding.
D)  covalent bonds.
E)  carbon-hydrogen bonds.F) C) and D)
G) A) and D)

Question 12

Which is the correct equation for the molar heat of sublimation?

Accepted Answer

A)  ΔHsub = ΔHfus - ΔHvapVliq
B)  ΔHsub = ΔHdep + ΔHfus
C)  ΔUsub= ΔUfus + ΔUvap
D)  ΔHsub = ΔHfus - ΔHvap
E)  ΔHsub = ΔHfus + ΔHvapF) A) and E)
G) A) and C)

Question 13

At what temperature does ethanol boil on a day in the mountains when the barometric pressure is 547 mmHg? The heat of vaporization of ethanol is 39.3 kJ/mol and its normal boiling point is 78.3°C.(R = 8.314 J/K • mol)

Accepted Answer

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

Question 14

Octane has a vapor pressure of 40.torr at 45.1°C and 400.torr at 104.0°C.What is its heat of vaporization? (R = 8.314 J/K • mol)

Accepted Answer

A)  39.1 kJ/mol
B)  46.0 kJ/mol
C)  590 kJ/mol
D)  710 kJ/mol
E)  None of these choices is correct.F) D) and E)
G) A) and E)

Question 15

___________ is the attraction of unlike molecules involved in capillary action.

Accepted Answer

The answer of ___________ is the attraction of unlike molecules...

Question 16

How much energy (heat) is required to convert 52.0 g of ice at -10.0°C to steam at 100°C? Specific heat of ice 2.09 J/g • °C
Specific heat of water 4.18 J/g • °C
Specific heat of steam 1.84 J/g • °C
Molar heat of fusion 6.02 kJ/mol
Molar heat of vaporization 40.7 kJ/mol

Accepted Answer

A)  12.0 kJ
B)  23.0 kJ
C)  46.4 kJ
D)  158 kJ
E)  2.30 ×104 kJF) A) and D)
G) C) and D)

Question 17

Ice is less dense than water due to the formation of hydrogen bonds.

Accepted Answer

A) True 
 B)False

Question 18

What is determined by the magnitude of intermolecular forces in a liquid and is a measure of a fluid's resistance to flow?

Accepted Answer

A)  Surface tension
B)  Adhesion
C)  Polarity
D)  Viscosity
E)  CohesionF) A) and C)
G) A) and D)

Question 19

Which statement is true about phase diagrams?

Accepted Answer

A)  Every phase diagram has only one triple point.
B)  The slope of the liquid-solid phase boundary line is typically negative.
C)  The triple point temperature is the lowest temperature where a liquid can exist.
D)  The critical temperature is lower than the triple point temperature.
E)  The critical temperature is lower than the normal boiling point.F) A) and D)
G) C) and D)

Question 20

Which of the following pure substances has the strongest dispersion forces?

Accepted Answer

A)  C4H10
B)  C5H12
C)  C6H14
D)  C7H16
E)  C8H18F) A) and B)
G) All of the above

Exam 11: Intermolecular Forces and the Physical Properties of Liquids and Solids

What is the name given for the attraction between unlike molecules involved in capillary action?

Correct AnswerverifiedShow Answer

Platinum has a face-centered cubic crystal structure and a density of 21.5 g/cm3.What is the radius of a platinum atom?

Correct AnswerverifiedShow Answer

Ionic crystals are composed of charged spheres that are held together by covalent bonds.

Correct AnswerverifiedShow Answer

Ice is less dense than water due to the formation of hydrogen bonds.

Correct AnswerverifiedShow Answer

Which is the correct equation for the molar heat of sublimation?

Correct AnswerverifiedShow Answer

What is the intermolecular force that exists between a magnesium ion and hydrogen sulfide?

Correct AnswerverifiedShow Answer

Which statement is true about phase diagrams?

Correct AnswerverifiedShow Answer

Octane is a component of fuel used in internal combustion engines.The dominant intermolecular forces in octane are

Correct AnswerverifiedShow Answer

A face-centered crystal lattice has one atom in the center of the unit cell.

Correct AnswerverifiedShow Answer

At what temperature does ethanol boil on a day in the mountains when the barometric pressure is 547 mmHg? The heat of vaporization of ethanol is 39.3 kJ/mol and its normal boiling point is 78.3°C.(R = 8.314 J/K • mol)

Correct AnswerverifiedShow Answer

Which of the following pure substances has the strongest dispersion forces?

Correct AnswerverifiedShow Answer

How much energy (heat) is required to convert 52.0 g of ice at -10.0°C to steam at 100°C? Specific heat of ice 2.09 J/g • °C Specific heat of water 4.18 J/g • °C Specific heat of steam 1.84 J/g • °C Molar heat of fusion 6.02 kJ/mol Molar heat of vaporization 40.7 kJ/mol

Correct AnswerverifiedShow Answer

Give an example of an ionic crystal and a metallic crystal which contain an element common to each.

Correct AnswerverifiedNaCl = ion...View AnswerShow Answer

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?

Correct AnswerverifiedWater is highly polar and poly...View AnswerShow Answer

If liquid bromine is cooled to form a solid,which type of solid does it form?

Correct AnswerverifiedShow Answer

Octane has a vapor pressure of 40.torr at 45.1°C and 400.torr at 104.0°C.What is its heat of vaporization? (R = 8.314 J/K • mol)

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which arrow represents the process of vaporization?

Correct AnswerverifiedShow Answer

What is determined by the magnitude of intermolecular forces in a liquid and is a measure of a fluid's resistance to flow?

Correct AnswerverifiedShow Answer

___________ is the attraction of unlike molecules involved in capillary action.

Correct AnswerverifiedShow Answer

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NaCl = ion...
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Water is highly polar and poly...
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