Question 1

Define freezing.

Accepted Answer

A)   the phase transition from solid to gas
B)   the phase transition from gas to solid
C)   the phase transition from gas to liquid
D)   the phase transition from liquid to gas
E)   the phase transition from liquid to solid

Question 2

Choose the substance with the highest surface tension.

Accepted Answer

A)   HOCH2CH2OH
B)   CH2Br2
C)   CH3CH2Cl
D)   CH3CH2OH
E)   CH3CH2CH3

Question 3

What is the strongest type of intermolecular force present in CH2F2?

Accepted Answer

A)   dispersion
B)   dipole-dipole
C)   hydrogen bonding
D)   ion-dipole
E)   none of the above

Question 4

Which of the following compounds exhibits hydrogen bonding?

Accepted Answer

A)   CH3I
B)   HBr 
C)   CH3OCH3
D)   CH3NH2

Question 5

Define volatile.

Accepted Answer

Liquids th...

Question 6

How much energy is required to vaporize 158 g of butane (C4H10) at its boiling point,if its ΔHvap is 24.3 kJ/mol?

Accepted Answer

A)   15.1 kJ
B)   66.1 kJ
C)   41.9 kJ
D)   2.60 kJ
E)   38.4 kJ

Question 7

Choose the molecule or compound that exhibits dispersion forces as its strongest intermolecular force.

Accepted Answer

A)   O2
B)   CO
C)   HF
D)   NaCl
E)   All of these have intermolecular forces stronger than dispersion.

Question 8

Define boiling.

Accepted Answer

A)   A liquid becomes a gas.
B)   A gas becomes a liquid.
C)   A gas becomes a solid.
D)   A solid becomes a gas.
E)   A solid becomes a liquid.

Question 9

Identify the place which has the lowest boiling point of water.

Accepted Answer

A)   Death Valley, 282 feet below sea level
B)   a pressurized passenger jet, 35,000 feet
C)   New Orleans, sea level
D)   Mt. Everest, 29,035 feet
E)   Denver, Colorado, 5280 feet

Question 10

Choose the substance with the highest vapor pressure at a given temperature.

Accepted Answer

A)   SiS2
B)   RbCl
C)   CH3SCH3
D)   BF3
E)   SbH3

Question 11

In a liquid,the energy required to increase the surface area by a unit amount is called

Accepted Answer

A)   viscosity.
B)   surface tension.
C)   dipole-dipole force.
D)   hydrogen bonding.
E)   capillary action.

Question 12

Consider the phase diagram shown.What is the normal boiling point?

Accepted Answer

A)   31°C
B)   -56.7 °C
C)   -78.5 °C
D)   0°C
E)   100°C

Question 13

The heat of vaporization of acetone is 31.3 kJ/mol,and a a boiling point of 78.6° at 1520 mm Hg.What is the boiling point when the pressure is raised to 7600 mm Hg?

Accepted Answer

A)   211°C
B)   182°C
C)   83.5°C
D)   141°C
E)   118°C

Question 14

Based on the figure above,the boiling point of ethyl alcohol under an external pressure of  is ________ °C.

Accepted Answer

A)   80
B)   60
C)   70
D)   40
E)   20

Question 15

Identify the characteristics of a gas.

Accepted Answer

A)   indefinite shape and volume
B)   indefinite shape, but definite volume
C)   definite shape and volume
D)   none of the above
E)   all of the above

Question 16

Identify the term used to describe the ability of a liquid to flow against gravity up a narrow tube.

Accepted Answer

A)   capillary action
B)   viscosity
C)   surface tension
D)   density
E)   none of the above

Question 17

Why do O,F and N,when bonded to H,form such strong intermolecular attractions to neighboring molecules?
 Make sure to be specific.

Accepted Answer

Oxygen,fluorine and nitrogen are all ver...

Question 18

Define boiling point of a liquid.

Accepted Answer

The temperature at w...

Question 19

Place the following compounds in order of increasing strength of intermolecular forces. CH4 CH3CH2CH3 CH3CH3

Accepted Answer

A)   CH3CH2CH3 4 3CH3
B)   CH3CH2CH3 3CH3 4
C)   CH3CH3 4 3CH2CH3
D)   CH4 3CH2CH3 3CH3
E)   CH4 3CH3 3CH2CH3

Question 20

Consider the phase diagram shown.What is the triple point?

Accepted Answer

A)   72.9 atm, 31 °C
B)   5.1 atm, -56.7 °C
C)   1 atm, -78.5 °C
D)   5.1 atm, 31 °C
E)   72.9 atm, -56.7 °C

Exam 12: Liquids, Solids, and Intermolecular Forces

Choose the substance with the highest surface tension.

Correct AnswerverifiedShow Answer

How much energy is required to vaporize 158 g of butane (C4H10) at its boiling point,if its ΔHvap is 24.3 kJ/mol?

Correct AnswerverifiedShow Answer

Define freezing.

Correct AnswerverifiedShow Answer

Place the following compounds in order of increasing strength of intermolecular forces. CH4 CH3CH2CH3 CH3CH3

Correct AnswerverifiedShow Answer

Choose the molecule or compound that exhibits dispersion forces as its strongest intermolecular force.

Correct AnswerverifiedShow Answer

Choose the substance with the highest vapor pressure at a given temperature.

Correct AnswerverifiedShow Answer

Why do O,F and N,when bonded to H,form such strong intermolecular attractions to neighboring molecules? Make sure to be specific.

Correct AnswerverifiedOxygen,fluorine and nitrogen are all ver...View AnswerShow Answer

Consider the phase diagram shown.What is the normal boiling point?

Correct AnswerverifiedShow Answer

Based on the figure above,the boiling point of ethyl alcohol under an external pressure of is ________ °C.

Correct AnswerverifiedShow Answer

Consider the phase diagram shown.What is the triple point?

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Define boiling point of a liquid.

Correct AnswerverifiedThe temperature at w...View AnswerShow Answer

What is the strongest type of intermolecular force present in CH2F2?

Correct AnswerverifiedShow Answer

In a liquid,the energy required to increase the surface area by a unit amount is called

Correct AnswerverifiedShow Answer

Which of the following compounds exhibits hydrogen bonding?

Correct AnswerverifiedShow Answer

Identify the term used to describe the ability of a liquid to flow against gravity up a narrow tube.

Correct AnswerverifiedShow Answer

Identify the characteristics of a gas.

Correct AnswerverifiedShow Answer

The heat of vaporization of acetone is 31.3 kJ/mol,and a a boiling point of 78.6° at 1520 mm Hg.What is the boiling point when the pressure is raised to 7600 mm Hg?

Correct AnswerverifiedShow Answer

Define volatile.

Correct AnswerverifiedLiquids th...View AnswerShow Answer

Define boiling.

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Identify the place which has the lowest boiling point of water.

Correct AnswerverifiedShow Answer

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How much energy is required to vaporize 158 g of butane (C₄H₁₀) at its boiling point,if its ΔH_vap is 24.3 kJ/mol?

Correct Answer
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Place the following compounds in order of increasing strength of intermolecular forces. CH₄ CH₃CH₂CH₃ CH₃CH₃

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Oxygen,fluorine and nitrogen are all ver...
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The temperature at w...
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What is the strongest type of intermolecular force present in CH₂F₂?

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Liquids th...
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