Question 1

Based on the phase diagram shown below, how will the melting point of the substance change if the pressure is increased above 1 atm?

Accepted Answer

A)  The melting point will decrease.
B)  The melting point will remain the same.
C)  The melting point will increase.
D)  The substance will not melt at pressures of 1 atm and above; instead, the solid sublimes to form the gas phase.E) A) and B)
F) A) and C)

Question 2

The molecular property related to the ease with which the electron density in a neutral atom or molecule can be distorted is called

Accepted Answer

A)  a dipole moment.
B)  polarizability.
C)  a dispersion force.
D)  surface tension.
E)  a van der Waals force.F) A) and B)
G) A) and C)

Question 3

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 4

Which of the following substances should have the lowest boiling point?

Accepted Answer

A)  CBr4
B)  CBr3F
C)  CBr2F2
D)  CBrF3
E)  CF4F) A) and E)
G) None of the above

Question 5

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)  12F) C) and D)
G) A) and B)

Question 6

Indicate all the types of intermolecular forces of attraction in C2H6(g).

Accepted Answer

Question 7

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

Accepted Answer

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

Question 8

Which of the following liquids would have the highest viscosity at 25°C?

Accepted Answer

A)  CH3OCH3
B)  CH2Cl2
C)  C2H5OH
D)  CH3Br
E)  HOCH2CH2OHF) C) and D)
G) A) and B)

Question 9

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) O2 doesn't boil because it is always a gas." class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

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

Question 10

Indicate all the types of intermolecular forces of attraction in F2(l).

Accepted Answer

Question 11

The zincblende structure of ZnS has the relatively large sulfide ions arranged at the lattice points of a face-centered cubic structure. The edge length of this cubic unit cell is 540.9 pm.Determine the density of zincblende.

Accepted Answer

A)  3.081 g/cm3
B)  1.023 g/cm3
C)  4.091 g/cm3
D)  2.046 g/cm3
E)  2.032 g/cm3F) None of the above
G) B) and E)

Question 12

Based on the phase diagram shown below, which is more dense: the liquid phase or the solid phase?

Accepted Answer

the solid ...

Question 13

Given that the heat of vaporization of diethyl ether is 26.0 kJ/mol and the vapor pressure of diethyl ether is 440 torr at 20.°C, calculate the normal boiling point of diethyl ether.

Accepted Answer

36°C (the ...

Question 14

The vapor pressure of ethanol is 400 mmHg at 63.5°C. Its molar heat of vaporization is 39.3 kJ/mol. What is vapor pressure of ethanol, in mmHg, at 34.9°C?

Accepted Answer

A)  1,510 mmHg
B)  100 mmHg
C)  200 mmHg
D)  0.0099 mmHg
E)  4.61 mmHgF) A) and B)
G) A) and C)

Question 15

Of the pair of compounds given, which would have the stronger intermolecular forces of attraction?
HF or HCl

Accepted Answer

The answer of Of the pair of compounds given, which...

Question 16

What phase exists at the point labeled a?

Accepted Answer

solid

Question 17

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

Accepted Answer

Question 18

Given the following compound and its boiling point, identify whether it is polar or nonpolar: H2S, -60.7°C.

Accepted Answer

polar

Question 19

Of the pair of compounds given, which would have the stronger intermolecular forces of attraction?
H2S or H2Se

Accepted Answer

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

Based on the phase diagram shown below, how will the melting point of the substance change if the pressure is increased above 1 atm?

Correct AnswerverifiedShow Answer

The molecular property related to the ease with which the electron density in a neutral atom or molecule can be distorted is called

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following substances should have the lowest boiling point?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Indicate all the types of intermolecular forces of attraction in C2H6(g).

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following liquids would have the highest viscosity at 25°C?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedB

Indicate all the types of intermolecular forces of attraction in F2(l).

Correct AnswerverifiedShow Answer

The zincblende structure of ZnS has the relatively large sulfide ions arranged at the lattice points of a face-centered cubic structure. The edge length of this cubic unit cell is 540.9 pm.Determine the density of zincblende.

Correct AnswerverifiedShow Answer

Based on the phase diagram shown below, which is more dense: the liquid phase or the solid phase?

Correct Answerverifiedthe solid ...View AnswerShow Answer

Given that the heat of vaporization of diethyl ether is 26.0 kJ/mol and the vapor pressure of diethyl ether is 440 torr at 20.°C, calculate the normal boiling point of diethyl ether.

Correct Answerverified36°C (the ...View AnswerShow Answer

The vapor pressure of ethanol is 400 mmHg at 63.5°C. Its molar heat of vaporization is 39.3 kJ/mol. What is vapor pressure of ethanol, in mmHg, at 34.9°C?

Correct AnswerverifiedShow Answer

Of the pair of compounds given, which would have the stronger intermolecular forces of attraction? HF or HCl

Correct AnswerverifiedShow Answer

What phase exists at the point labeled a?

Correct Answerverifiedsolid

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

Correct AnswerverifiedShow Answer

Given the following compound and its boiling point, identify whether it is polar or nonpolar: H2S, -60.7°C.

Correct Answerverifiedpolar

Of the pair of compounds given, which would have the stronger intermolecular forces of attraction? H2S or H2Se

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct Answer
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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?

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

Correct Answer
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Indicate all the types of intermolecular forces of attraction in C₂H₆(g).

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

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B

Indicate all the types of intermolecular forces of attraction in F₂(l).

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the solid ...
View Answer

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36°C (the ...
View Answer

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solid

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

Correct Answer
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Given the following compound and its boiling point, identify whether it is polar or nonpolar: H₂S, -60.7°C.

Correct Answer
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polar

Of the pair of compounds given, which would have the stronger intermolecular forces of attraction? H₂S or H₂Se

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

Correct Answer
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