Question 1

Which phase change listed below represents the transition from the gaseous state to the liquid state?

Accepted Answer

A)  Condensation 
B)  Deposition 
C)  Evaporation 
D)  Freezing 
E)  Sublimation 
A)  Condensation 
B)  Deposition 
C)  Evaporation 
D)  Freezing 
E)  Sublimation

Question 2

The property of a liquid that causes small drops to be spherical is called:

Accepted Answer

A)  enthalpy of vaporization. 
B)  viscosity. 
C)  surface tension. 
D)  vapor pressure. 
E)  none of these 
A)  enthalpy of vaporization. 
B)  viscosity. 
C)  surface tension. 
D)  vapor pressure. 
E)  none of these

Question 3

In a closest packing array of atoms, how many nearest neighbors does each atom have?

Accepted Answer

A)  4 
B)  6 
C)  8 
D)  12 
E)  none of these 
A)  4 
B)  6 
C)  8 
D)  12 
E)  none of these

Question 4

Which of the following properties of a liquid increase as the strength of intermolecular forces increases?
I. enthalpy of vaporization
II. boiling point
III. surface tension

Accepted Answer

A)  I and II increase, III decreases 
B)  II and III increase, I decreases 
C)  I and III increase, II decreases 
D)  I, II, and III all increase 
E)  none of these are correct 
A)  I and II increase, III decreases 
B)  II and III increase, I decreases 
C)  I and III increase, II decreases 
D)  I, II, and III all increase 
E)  none of these are correct

Question 5

On the basis of intermolecular forces of attraction, rank the following three compounds in terms of increasing boiling point. CH3CH2CH2CH2CH3 (Pentane), CHCl3 (Chloroform) and H2O (Water)

Accepted Answer

A)  (lowest bp) Pentane < Chloroform < Water (highest bp) 
B)  (lowest bp) Pentane < Water < Chloroform (highest bp) 
C)  (lowest bp) Water < Chloroform < Pentane (highest bp) 
D)  (lowest bp) Water < Pentane < Chloroform (highest bp) 
E)  (lowest bp) Chloroform < Water < Pentane (highest bp) 
A)  (lowest bp) Pentane < Chloroform < Water (highest bp) 
B)  (lowest bp) Pentane < Water < Chloroform (highest bp) 
C)  (lowest bp) Water < Chloroform < Pentane (highest bp) 
D)  (lowest bp) Water < Pentane < Chloroform (highest bp) 
E)  (lowest bp) Chloroform < Water < Pentane (highest bp)

Question 6

The crystal forces in solid iodine are classified as:

Accepted Answer

A)  ionic 
B)  molecular 
C)  covalent network 
D)  metallic 
E)  none of these 
A)  ionic 
B)  molecular 
C)  covalent network 
D)  metallic 
E)  none of these

Question 7

Which of the following phase changes is an exothermic event?
I. Sublimation
II. Condensing
III. Melting

Accepted Answer

A)  I only 
B)  II only 
C)  III only 
D)  I and II 
E)  All of these 
A)  I only 
B)  II only 
C)  III only 
D)  I and II 
E)  All of these

Question 8

Exhibit 11-4 Consider Aluminum metal that crystallizes in a face centered cubic cell to answer the following problem(s). The atomic radius of an aluminum atom is 1.43 . One face of this unit cell is shown in the diagram below.  
-Refer to Exhibit 11-4. What is the volume of this unit cell?

Accepted Answer

A)  2.92 Å3 
B)  4.84 Å3 
C)  23.4 Å3 
D)  66.2 Å3 
E)  187 Å3 
A)  2.92 Å3 
B)  4.84 Å3 
C)  23.4 Å3 
D)  66.2 Å3 
E)  187 Å3

Question 9

Which of the following phase changes listed below would be considered endothermic ?
I. Sublimation
II. Deposition
III. Condensation

Accepted Answer

A)  I only 
B)  II only 
C)  I and II 
D)  I and III 
E)  All of these 
A)  I only 
B)  II only 
C)  I and II 
D)  I and III 
E)  All of these

Question 10

What type of crystal forces hold the units together in solid sodium iodide?

Accepted Answer

A)  molecular 
B)  ionic 
C)  covalent network 
D)  metallic bonds 
E)  does not crystallize 
A)  molecular 
B)  ionic 
C)  covalent network 
D)  metallic bonds 
E)  does not crystallize

Question 11

How many unit cells share an atom at the corner of a cubic unit cell?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  8 
A)  1 
B)  2 
C)  3 
D)  4 
E)  8

Question 12

Cesium chloride crystallizes in a unit cell with the Cesium ions in a primitive cubic unit cell arrangement (at the corners). Given that the formula for cesium chloride is CsCl, where are the chloride ions expected to reside in the unit cell?

Accepted Answer

A)  Along each edge 
B)  On each face 
C)  At the center 
D)  Along each edge, at the center and on each face 
E)  None of these 
A)  Along each edge 
B)  On each face 
C)  At the center 
D)  Along each edge, at the center and on each face 
E)  None of these

Question 13

Three molecules are listed below. Will hydrogen bonding be important for any of them?
Pick the correct answer.
I. HBr
II. CH3OH
III. NH3

Accepted Answer

A)  I and II will hydrogen bond, III will not 
B)  I and III will hydrogen bond, II will not 
C)  II and III will hydrogen bond, I will not 
D)  all three will hydrogen bond 
E)  only III will hydrogen bond 
A)  I and II will hydrogen bond, III will not 
B)  I and III will hydrogen bond, II will not 
C)  II and III will hydrogen bond, I will not 
D)  all three will hydrogen bond 
E)  only III will hydrogen bond

Question 14

Exhibit 11-1 The heating curve below is needed for the following question(s).  
Refer to Exhibit 11-1. For the heating curve shown, which letter labels the line segment where only solid is present?

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
E)  E 
A)  A 
B)  B 
C)  C 
D)  D 
E)  E

Question 15

In a simple cubic unit cell comprised of uniform size spheres, what is the coordination number of each sphere?

Accepted Answer

A)  3 
B)  4 
C)  6 
D)  8 
E)  12 
A)  3 
B)  4 
C)  6 
D)  8 
E)  12

Question 16

Given the three statements below, pick the best answer.
I. The normal boiling point of a liquid is the temperature at which its vapor pressure is 1 atm.
II. Water always boils at 100 ° C.
III. The vapor pressure of a liquid increases with increasing temperature.

Accepted Answer

A)  I and II are true, III is false 
B)  I and III are true, II is false 
C)  II and III are true, I is false 
D)  all three are true 
E)  only III is true 
A)  I and II are true, III is false 
B)  I and III are true, II is false 
C)  II and III are true, I is false 
D)  all three are true 
E)  only III is true

Question 17

Exhibit 11-1 The heating curve below is needed for the following question(s).  
Refer to Exhibit 11-1. For the heating curve shown, which letter labels the line segment that corresponds to the heat of vaporization?

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
E)  E 
A)  A 
B)  B 
C)  C 
D)  D 
E)  E

Question 18

Arrange the following elements in order of increasing boiling point. Argon, Helium, Neon

Accepted Answer

A)  (lowest bp) Argon < Helium < Neon (highest bp) 
B)  (lowest bp) Argon < Neon < Helium (highest bp) 
C)  (lowest bp) Helium < Neon < Argon (highest bp) 
D)  (lowest bp) Helium < Argon < Neon (highest bp) 
E)  (lowest bp) Neon < Helium < Argon (highest bp) 
A)  (lowest bp) Argon < Helium < Neon (highest bp) 
B)  (lowest bp) Argon < Neon < Helium (highest bp) 
C)  (lowest bp) Helium < Neon < Argon (highest bp) 
D)  (lowest bp) Helium < Argon < Neon (highest bp) 
E)  (lowest bp) Neon < Helium < Argon (highest bp)

Question 19

At room temperature chlorine is a gas, bromine is a liquid, and iodine is a solid. All three exist as diatomic molecules at this temperature. The intermolecular attractions in these substances increase in the order:

Accepted Answer

A)  I2 2 2 
B)  Br2 2 2 
C)  Cl2 2 2 
D)  I2 2 2 
E)  none of these 
A)  I2 2 2 
B)  Br2 2 2 
C)  Cl2 2 2 
D)  I2 2 2 
E)  none of these

Question 20

Formaldehyde is a colorless gas but when dissolved in water can be used in embalming fluids. Which intermolecular force(s) is(are) present among formaldehyde molecules shown below?

Accepted Answer

A)  London dispersion 
B)  Dipole-dipole 
C)  Hydrogen bonding 
D)  a and b 
E)  all of these 
A)  London dispersion 
B)  Dipole-dipole 
C)  Hydrogen bonding 
D)  a and b 
E)  all of these

Exam 11: Liquids and Solids

Which phase change listed below represents the transition from the gaseous state to the liquid state?

The property of a liquid that causes small drops to be spherical is called:

In a closest packing array of atoms, how many nearest neighbors does each atom have?

Which of the following properties of a liquid increase as the strength of intermolecular forces increases? I. enthalpy of vaporization II. boiling point III. surface tension

On the basis of intermolecular forces of attraction, rank the following three compounds in terms of increasing boiling point. CH3CH2CH2CH2CH3 (Pentane), CHCl3 (Chloroform) and H2O (Water)

The crystal forces in solid iodine are classified as:

Which of the following phase changes is an exothermic event? I. Sublimation II. Condensing III. Melting

Exhibit 11-4 Consider Aluminum metal that crystallizes in a face centered cubic cell to answer the following problem(s). The atomic radius of an aluminum atom is 1.43 . One face of this unit cell is shown in the diagram below. -Refer to Exhibit 11-4. What is the volume of this unit cell?

Which of the following phase changes listed below would be considered endothermic ? I. Sublimation II. Deposition III. Condensation

What type of crystal forces hold the units together in solid sodium iodide?

How many unit cells share an atom at the corner of a cubic unit cell?

Cesium chloride crystallizes in a unit cell with the Cesium ions in a primitive cubic unit cell arrangement (at the corners). Given that the formula for cesium chloride is CsCl, where are the chloride ions expected to reside in the unit cell?

Three molecules are listed below. Will hydrogen bonding be important for any of them? Pick the correct answer. I. HBr II. CH3OH III. NH3

Exhibit 11-1 The heating curve below is needed for the following question(s). Refer to Exhibit 11-1. For the heating curve shown, which letter labels the line segment where only solid is present?

In a simple cubic unit cell comprised of uniform size spheres, what is the coordination number of each sphere?

Given the three statements below, pick the best answer. I. The normal boiling point of a liquid is the temperature at which its vapor pressure is 1 atm. II. Water always boils at 100 ° C. III. The vapor pressure of a liquid increases with increasing temperature.

Exhibit 11-1 The heating curve below is needed for the following question(s). Refer to Exhibit 11-1. For the heating curve shown, which letter labels the line segment that corresponds to the heat of vaporization?

Arrange the following elements in order of increasing boiling point. Argon, Helium, Neon

At room temperature chlorine is a gas, bromine is a liquid, and iodine is a solid. All three exist as diatomic molecules at this temperature. The intermolecular attractions in these substances increase in the order:

Formaldehyde is a colorless gas but when dissolved in water can be used in embalming fluids. Which intermolecular force(s) is(are) present among formaldehyde molecules shown below?

Introduction to Chemistry

Atoms, Molecules, and Ions

Equations, the Mole, and Chemical Formulas

Chemical Reactions in Solution

Thermochemistry

The Gaseous State

Electronic Structure

The Periodic Table: Structure and Trends

Chemical Bonds

Molecular Structure and Bonding Theories

Solutions

Chemical Kinetics

Chemical Equilibrium

Solutions of Acids and Bases

Reactions Between Acids and Bases

Chemical Thermodynamics

Electrochemistry

Transition Metals, Coordination Chemistry and Metallurgy

The Chemistry of Hydrogen, Elements in Groups 3A Through 6A, and the Noble Gases

Nuclear Chemistry

Organic Chemistry and Biochemistry

Filters

On the basis of intermolecular forces of attraction, rank the following three compounds in terms of increasing boiling point. CH₃CH₂CH₂CH₂CH₃ (Pentane), CHCl₃ (Chloroform) and H₂O (Water)

Three molecules are listed below. Will hydrogen bonding be important for any of them? Pick the correct answer. I. HBr II. CH₃OH III. NH₃