Question 1

What is the energy in kJ/mol required to melt 1 mole of a solid?

Accepted Answer

A)   molar heat of freezing
B)   molar heat of fission
C)   molar heat of vaporization
D)   molar heat of fusion
E)   molar heat of condensationF) B) and E)
G) None of the above

Question 2

Which substance has the highest vapor pressure at room temperature?

Accepted Answer

A)   HF
B)   HCl
C)   HBr
D)   HI
E)   All of these substances have the same vapor pressure at room temperature.F) All of the above
G) A) and C)

Question 3

________ ________ is a special type of dipole-dipole interaction.

Accepted Answer

The answer of ________ ________ is a special type of...

Question 4

Use the graph of vapor pressure to determine the normal boiling point of O2. 2.   A)  92 K B)  90. K C)  88 K D)  84 K E)  78 K" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   92 K
B)   90. K
C)   88 K
D)   84 K
E)   78 KF) B) and C)
G) C) and D)

Question 5

Iron crystallizes in the body-centered cubic lattice. What is the coordination number for Fe?

Accepted Answer

A)   4
B)   6
C)   8
D)   10
E)   12F) None of the above
G) A) and C)

Question 6

Which statement is true about phase diagrams?

Accepted Answer

A)   The triple point pressure is always found below 1 atmosphere.
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 C)
G) C) and D)

Question 7

The energy of a hydrogen bond is greater than that of a typical covalent bond.

Accepted Answer

A) True 
 B)False

Question 8

The atomic planes in a graphite crystal are separated by 335 pm. At what angle would you find the first-order (n = 1)  diffraction of 0.154-nm X rays from a graphite crystal?

Accepted Answer

A)   27.4°
B)   66.8°
C)   0.232°
D)   13.3°
E)   38.0°F) A) and B)
G) A) and C)

Question 9

Variable melting point, variable hardness, and good conductor of heat and electricity are properties which describe a(n) ________ crystal.

Accepted Answer

The answer of Variable melting point, variable hardness, and good...

Question 10

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

Accepted Answer

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

Question 11

Which arrow represents the process of vaporization?

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) None of the above
G) All of the above

Question 12

In the packing of identical atoms with cubic unit cells, the packing efficiency increases as the coordination number increases.

Accepted Answer

A) True 
 B)False

Question 13

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) C) and D)
G) B) and D)

Question 14

Which of the following lacks a regular three-dimensional arrangement of atoms?

Accepted Answer

A)   crystalline solid
B)   ionic crystal
C)   solid
D)   amorphous solid
E)   molecular solidF) A) and B)
G) None of the above

Question 15

The location that indicates conditions under which two phases can exist in equilibrium is called the

Accepted Answer

A)   triple point.
B)   critical point.
C)   phase boundary.
D)   phase diagram.
E)   transition state.F) A) and B)
G) All of the above

Question 16

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

Accepted Answer

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

Question 17

The strongest intermolecular interactions between hydrogen fluoride (HF)  molecules arise from

Accepted Answer

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

Question 18

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

Accepted Answer

Question 19

Which substance will exhibit hydrogen bonding between molecules?

Accepted Answer

A)   (CH3) 3N
B)   CH3-O-CH3
C)   CH3CH2-OH
D)   CH3CH2-F
E)   HIF) C) and D)
G) B) and E)

Question 20

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

Accepted Answer

NaCl = ion...

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

Which substance will exhibit hydrogen bonding between molecules?

Correct AnswerverifiedShow Answer

Which of the following lacks a regular three-dimensional arrangement of atoms?

Correct AnswerverifiedShow Answer

What is the energy in kJ/mol required to melt 1 mole of a solid?

Correct AnswerverifiedShow Answer

The energy of a hydrogen bond is greater than that of a typical covalent bond.

Correct AnswerverifiedShow Answer

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

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

Which statement is true about phase diagrams?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The location that indicates conditions under which two phases can exist in equilibrium is called the

Correct AnswerverifiedShow Answer

Iron crystallizes in the body-centered cubic lattice. What is the coordination number for Fe?

Correct AnswerverifiedShow Answer

The strongest intermolecular interactions between hydrogen fluoride (HF) molecules arise from

Correct AnswerverifiedShow Answer

Which arrow represents the process of vaporization?

Correct AnswerverifiedShow Answer

The atomic planes in a graphite crystal are separated by 335 pm. At what angle would you find the first-order (n = 1) diffraction of 0.154-nm X rays from a graphite crystal?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Variable melting point, variable hardness, and good conductor of heat and electricity are properties which describe a(n) ________ crystal.

Correct AnswerverifiedShow Answer

In the packing of identical atoms with cubic unit cells, the packing efficiency increases as the coordination number increases.

Correct AnswerverifiedShow Answer

________ ________ is a special type of dipole-dipole interaction.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which substance has the highest vapor pressure at room temperature?

Correct AnswerverifiedShow Answer

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

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NaCl = ion...
View Answer

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is a special type of dipole-dipole interaction.

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

Correct Answer
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