Question 1

The intermolecular forces present in C6H6 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)   III onlyF) A) and B)
G) All of the above

Question 2

The normal boiling point of bromine is 58.8 ∘\circ∘ C. Given that the vapor pressure of bromine is 75.0 torr at 2.5 ∘\circ∘ C, calculate the molar enthalpy of vaporization of bromine.

Accepted Answer

A)   2.90 kJ/mol
B)   3.57 kJ/mol
C)   3.76 kJ/mol
D)   29.7 kJ/mol
E)   31.3 kJ/mol F) A) and C)
G) D) and E)

Question 3

Palladium crystallizes in a face-centered cubic unit cell. Its density is 12.0 g/cm3 at 27 ∘\circ∘ C. Calculate the atomic radius of Pd.

Accepted Answer

A)   154 pm
B)   138 pm
C)   1.95 * 10-8 nm
D)   0.109 nm
E)   1.95 * 10-8 cm F) B) and C)
G) C) and E)

Question 4

Which of the following phase changes is endothermic

Accepted Answer

A)   Sublimation
B)   Condensation
C)   Freezing
D)   DepositionE) B) and D)
F) None of the above

Question 5

Butter melts over a range of temperatures, rather than with a sharp melting point. Butter is classified as a/an

Accepted Answer

A)   metallic crystal.
B)   covalent solid.
C)   molecular crystal.
D)   amorphous solid.
E)   ionic crystal.F) A) and D)
G) D) and E)

Question 6

Which one of the following substances will have both dispersion forces and dipole-dipole forces

Accepted Answer

A)   HCl
B)   BCl3
C)   Br2
D)   H2
E)   CO2F) C) and E)
G) A) and E)

Question 7

Indicate all the types of intermolecular forces of attraction in CH3OH(l) .

Accepted Answer

A)   Dispersion and Dipole-dipole
B)   Dipole-dipole and Ionic
C)   Ion-dipole and Hydrogen bonding
D)   Hydrogen bonding and Dispersion
E)   DispersionF) B) and C)
G) B) and D)

Question 8

The molar enthalpy of vaporization of boron tribromide is 30.5 kJ/mol, and its normal boiling point is 91 ∘\circ∘ C. What is the vapor pressure of BBr3 at 20 ∘\circ∘ C

Accepted Answer

A)   11.5 torr
B)   311 torr
C)   5.31 torr
D)   143 torr
E)   66.1 torr F) B) and E)
G) C) and D)

Question 9

Given the following liquids and their boiling points, which has the highest vapor pressure at its normal boiling point

Accepted Answer

A)   ethanol, bp = 78 ∘\circ∘ C
B)   methanol, bp = 65 ∘\circ∘ C
C)   water, bp = 100 ∘\circ∘ C
D)   benzene, bp = 80 ∘\circ∘ C
E)   The vapor pressure of each of the liquids at its normal boiling point would be the same. F) A) and B)
G) A) and C)

Question 10

NH3 has a higher boiling point than CH4.

Accepted Answer

A) True 
 B)False

Question 11

The number of nearest neighbors (atoms that make contact)  around each atom in a face-centered cubic lattice of a metal is

Accepted Answer

A)   2.
B)   4.
C)   6.
D)   8.
E)   12.F) C) and D)
G) A) and B)

Question 12

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 13

At room temperature, honey is more viscous than mustard.

Accepted Answer

A) True 
 B)False

Question 14

H2S has stronger intermolecular forces of attraction than H2Se.

Accepted Answer

A) True 
 B)False

Question 15

The gas phase exists at the point labeled a.

Accepted Answer

A) True 
 B)False

Question 16

The structural form of the element Ge closely resembles the structure of

Accepted Answer

A)   C (diamond) .
B)   N (diatomic) .
C)   As (tetrahedral) .
D)   S (S8 ring) .
E)   Kr (monatomic) .F) A) and B)
G) B) and D)

Question 17

At a given temperature CCl4 has a weaker surface tension than H2O.

Accepted Answer

A) True 
 B)False

Question 18

Use the graph of vapor pressure to determine the normal boiling point of O2.  2.    A)  84 K B)  88 K C)  90 K D)  92 K E)  O2 doesn't boil because it is always a gas." class="answers-bank-image d-inline" rel="preload" >

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.F) A) and D)
G) B) and D)

Question 19

An example of a covalent network solid is

Accepted Answer

A)   diamond.
B)   potassium.
C)   iodine.
D)   sodium chloride.
E)   none of these.F) B) and D)
G) A) and B)

Question 20

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

Accepted Answer

A) True 
 B)False

Exam 11: Intermolecular Forces and Liquids and Solids

The normal boiling point of bromine is 58.8 ∘\circ∘ C. Given that the vapor pressure of bromine is 75.0 torr at 2.5 ∘\circ∘ C, calculate the molar enthalpy of vaporization of bromine.

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An example of a covalent network solid is

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NH3 has a higher boiling point than CH4.

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At a given temperature CCl4 has a weaker surface tension than H2O.

Correct AnswerverifiedShow Answer

The molar enthalpy of vaporization of boron tribromide is 30.5 kJ/mol, and its normal boiling point is 91 ∘\circ∘ C. What is the vapor pressure of BBr3 at 20 ∘\circ∘ C

Correct AnswerverifiedShow Answer

Butter melts over a range of temperatures, rather than with a sharp melting point. Butter is classified as a/an

Correct AnswerverifiedShow Answer

The gas phase exists at the point labeled a.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The number of nearest neighbors (atoms that make contact) around each atom in a face-centered cubic lattice of a metal is

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Palladium crystallizes in a face-centered cubic unit cell. Its density is 12.0 g/cm3 at 27 ∘\circ∘ C. Calculate the atomic radius of Pd.

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Given the following liquids and their boiling points, which has the highest vapor pressure at its normal boiling point

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Which one of the following substances will have both dispersion forces and dipole-dipole forces

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H2S has stronger intermolecular forces of attraction than H2Se.

Correct AnswerverifiedShow Answer

The structural form of the element Ge closely resembles the structure of

Correct AnswerverifiedShow Answer

The intermolecular forces present in C6H6 include which of the following I. dipole-dipole II. ion-dipole III. dispersion IV. hydrogen bonding

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Indicate all the types of intermolecular forces of attraction in CH3OH(l) .

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following phase changes is endothermic

Correct AnswerverifiedShow Answer

At room temperature, honey is more viscous than mustard.

Correct AnswerverifiedShow Answer

The normal boiling point of bromine is 58.8^$\circ$C. Given that the vapor pressure of bromine is 75.0 torr at 2.5^$\circ$C, calculate the molar enthalpy of vaporization of bromine.

Correct Answer
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NH₃ has a higher boiling point than CH₄.

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At a given temperature CCl₄ has a weaker surface tension than H₂O.

Correct Answer
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The molar enthalpy of vaporization of boron tribromide is 30.5 kJ/mol, and its normal boiling point is 91^$\circ$C. What is the vapor pressure of BBr₃ at 20^$\circ$C

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

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Palladium crystallizes in a face-centered cubic unit cell. Its density is 12.0 g/cm³ at 27^$\circ$C. Calculate the atomic radius of Pd.

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H₂S has stronger intermolecular forces of attraction than H₂Se.

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The intermolecular forces present in C₆H₆ include which of the following I. dipole-dipole II. ion-dipole III. dispersion IV. hydrogen bonding

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Indicate all the types of intermolecular forces of attraction in CH₃OH(l) .

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

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