Question 1

When identical particles pack in a simple cubic lattice, there is/are ____ particle(s)  per unit cell.

Accepted Answer

A)   1
B)   2
C)   3
D)   4
E)   8F) B) and C)
G) A) and B)

Question 2

Which of the following liquids is likely to have the highest surface tension?

Accepted Answer

A)   Br2
B)   C8H18
C)   CH3OCH3
D)   CH3OH
E)   PbF) B) and C)
G) None of the above

Question 3

Ammonia's unusually high melting point is the result of

Accepted Answer

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

Question 4

Examine the following phase diagram and identify the feature represented by point B.

Accepted Answer

A)   melting point
B)   triple point
C)   critical point
D)   sublimation point
E)   boiling pointF) A) and E)
G) A) and D)

Question 5

In a transistor, the current through one semiconductor junction controls the current through a neighboring junction.

Accepted Answer

A) True 
 B)False

Question 6

A 5.00 g sample of water vapor, initially at 155°C is cooled at atmospheric pressure, producing ice at -55°C. Calculate the amount of heat energy lost by the water sample in this process, in kJ. Use the following data: specific heat capacity of ice is 2.09 J/gK; specific heat capacity of liquid water is 4.18 J/gK; specific heat capacity of water vapor is 1.84 J/gK; heat of fusion of ice is 336 J/g; heat of vaporization of water is 2260 J/g.

Accepted Answer

A)   15.6 kJ
B)   10.2 kJ
C)   5.4 kJ
D)   3.2 kJ
E)   1.6 kJF) None of the above
G) A) and E)

Question 7

Smectic liquid crystals are more highly ordered than either nematic or cholesteric liquid crystals.

Accepted Answer

A) True 
 B)False

Question 8

A temperature increase causes __________________ in the conductivity of a conductor.

Accepted Answer

A)   a decrease
B)   an increase
C)   an increase or decrease (depending on the conductor) 
D)   a modulation
E)   no changeF) A) and D)
G) C) and E)

Question 9

What word best describes the type of liquid crystal represented below?

Accepted Answer

A)   nematic
B)   cholesteric
C)   smectic
D)   isotropic
E)   elasticF) A) and B)
G) A) and D)

Question 10

The meniscus of mercury in a glass capillary tube is convex because of

Accepted Answer

A)   the very high density of mercury as compared with water.
B)   the low surface tension of mercury.
C)   the greater attraction of mercury atoms to the glass than to each other.
D)   the weaker attraction of mercury atoms to the glass than to each other.
E)   electrostatic repulsion between the glass and the mercury.F) B) and C)
G) B) and D)

Question 11

When the adhesive forces between a liquid and the walls of a capillary tube are greater than the cohesive forces within the liquid

Accepted Answer

A)   the liquid level in a capillary tube will rise above the surrounding liquid and the surface in the capillary tube will have a convex meniscus.
B)   the liquid level in a capillary tube will rise above the surrounding liquid and the surface in the capillary tube will have a concave meniscus.
C)   the liquid level in a capillary tube will drop below the surrounding liquid and the surface in the capillary tube will have a convex meniscus.
D)   the liquid level in a capillary tube will drop below the surrounding liquid and the surface in the capillary tube will have a concave meniscus.
E)   None of the above will occur.F) A) and C)
G) A) and D)

Exam 12: Intermolecular Forces: Liquids, Solids, and Phase Changes

When identical particles pack in a simple cubic lattice, there is/are ____ particle(s) per unit cell.

Correct Answer
verified

Ammonia's unusually high melting point is the result of

Correct Answer
verified

A temperature increase causes __________________ in the conductivity of a conductor.

Correct Answer
verified

What word best describes the type of liquid crystal represented below?

Correct Answer
verified

Examine the following phase diagram and identify the feature represented by point B.

Correct Answer
verified

Which of the following liquids is likely to have the highest surface tension?

Correct Answer
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Correct Answer
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The meniscus of mercury in a glass capillary tube is convex because of

Correct Answer
verified

When the adhesive forces between a liquid and the walls of a capillary tube are greater than the cohesive forces within the liquid

Correct Answer
verified

In a transistor, the current through one semiconductor junction controls the current through a neighboring junction.

Correct Answer
verified

Smectic liquid crystals are more highly ordered than either nematic or cholesteric liquid crystals.

Correct Answer
verified

Exam 12: Intermolecular Forces: Liquids, Solids, and Phase Changes

When identical particles pack in a simple cubic lattice, there is/are ____ particle(s) per unit cell.

Correct AnswerverifiedShow Answer

Ammonia's unusually high melting point is the result of

Correct AnswerverifiedShow Answer

A temperature increase causes __________________ in the conductivity of a conductor.

Correct AnswerverifiedShow Answer

What word best describes the type of liquid crystal represented below?

Correct AnswerverifiedShow Answer

Examine the following phase diagram and identify the feature represented by point B.

Correct AnswerverifiedShow Answer

Which of the following liquids is likely to have the highest surface tension?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The meniscus of mercury in a glass capillary tube is convex because of

Correct AnswerverifiedShow Answer

When the adhesive forces between a liquid and the walls of a capillary tube are greater than the cohesive forces within the liquid

Correct AnswerverifiedShow Answer

In a transistor, the current through one semiconductor junction controls the current through a neighboring junction.

Correct AnswerverifiedShow Answer

Smectic liquid crystals are more highly ordered than either nematic or cholesteric liquid crystals.

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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