Question 1

Consider a parallelepiped with all edges being equal in length.There is an atom at each corner and one in the absolute center.This is a ________.

Accepted Answer

A) face-centered cubic cell 
B) simple cubic cell 
C) unit cell 
D) body-centered cubic cell 
E) hexagonal unit cell 
A) face-centered cubic cell 
B) simple cubic cell 
C) unit cell 
D) body-centered cubic cell 
E) hexagonal unit cell

Question 2

Which of the following compounds exhibits only dispersion and dipole-dipole intermolecular interactions?

Accepted Answer

A) H2 
B) HI  
C) CO2 
D) CH3NH2 
A) H2 
B) HI  
C) CO2 
D) CH3NH2

Question 3

The heat of vaporization of water at 100 °C is 40.66 kJ mol-1.Calculate the quantity of heat that is absorbed/released when 9.00 g of steam condenses to liquid water at 100 °C.

Accepted Answer

A) 20.3 kJ of heat are absorbed. 
B) 20.3 kJ of heat are released. 
C) 81.3 kJ of heat are absorbed. 
D) 81.3 kJ of heat are released. 
A) 20.3 kJ of heat are absorbed. 
B) 20.3 kJ of heat are released. 
C) 81.3 kJ of heat are absorbed. 
D) 81.3 kJ of heat are released.

Question 4

A crystal does not conduct electricity,yet its melt and aqueous solutions do.It is hard and brittle and melts at a high temperature.What type of crystal is it?

Accepted Answer

A) a molecular crystal 
B) a network covalent crystal 
C) a metallic crystal 
D) an ionic crystal 
E) an intermetallic crystal 
A) a molecular crystal 
B) a network covalent crystal 
C) a metallic crystal 
D) an ionic crystal 
E) an intermetallic crystal

Question 5

According to the phase diagram given,which of the following statements is INCORRECT?

Accepted Answer

A) At the temperature and pressure of point 2,substance Z exists as a three-phase equilibrium system. 
B) At the temperature and pressure of point 3,substance Z exists as a one-phase gaseous system. 
C) If the Z(s)= Z(l)= Z(g)system is maintained at the temperature of point 2 while pressure is decreased,more Z will vaporize. 
D) If liquid Z is maintained at the pressure of point 4 while the temperature is decreased to 30 °C,the liquid will vaporize. 
E) The existence of liquid Z at -50 °C and 2 atm represents the metastable condition of "supercooling." 
A) At the temperature and pressure of point 2,substance Z exists as a three-phase equilibrium system. 
B) At the temperature and pressure of point 3,substance Z exists as a one-phase gaseous system. 
C) If the Z(s)= Z(l)= Z(g)system is maintained at the temperature of point 2 while pressure is decreased,more Z will vaporize. 
D) If liquid Z is maintained at the pressure of point 4 while the temperature is decreased to 30 °C,the liquid will vaporize. 
E) The existence of liquid Z at -50 °C and 2 atm represents the metastable condition of "supercooling."

Question 6

Liquid and vapor phases of a substance become indistinguishable at the ________.

Accepted Answer

A) triple point 
B) normal point 
C) permanent point 
D) critical point 
E) absolute point 
A) triple point 
B) normal point 
C) permanent point 
D) critical point 
E) absolute point

Question 7

Surface tension is thought to be due to:

Accepted Answer

A) surface area trying to increase 
B) air absorbed on the surface 
C) solute concentrated on the surface 
D) surface molecules having lower energy than bulk molecules 
E) surface molecules having higher energy than molecules in the bulk 
A) surface area trying to increase 
B) air absorbed on the surface 
C) solute concentrated on the surface 
D) surface molecules having lower energy than bulk molecules 
E) surface molecules having higher energy than molecules in the bulk

Question 8

Given the data below,determine the molar enthalpy of vaporization of liquid Rb.
Rb,P1 = 1.00 mmHg,t1 = 297 °C,P2 = 400 mmHg,t2 = 620 °C

Accepted Answer

A) 5.49 kJ/mol 
B) 28.4 kJ/mol 
C) 78.5 kJ/mol 
D) 12.8 kJ/mol 
E) 4.62 kJ/mol 
A) 5.49 kJ/mol 
B) 28.4 kJ/mol 
C) 78.5 kJ/mol 
D) 12.8 kJ/mol 
E) 4.62 kJ/mol

Question 9

Below are given the Lewis structures of five molecules.Which one displays the LEAST hydrogen bonding?

Accepted Answer

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

Question 10

The enthalpy of condensation is equal to,but opposite in sign from,the enthalpy of ________.

Accepted Answer

A) crystallization 
B) formation 
C) fusion 
D) sublimation 
E) vaporization 
A) crystallization 
B) formation 
C) fusion 
D) sublimation 
E) vaporization

Question 11

Given the data below,determine the molar enthalpy of vaporization of COCl2.
COCl2,P1 = 40 mmHg,t1 = -50.3 °C,P2 = 100 mmHg,t2 = -35.6 °C

Accepted Answer

A) 0.518 kJ/mol 
B) 27.4 kJ/mol 
C) 4.32 kJ/mol 
D) 0.928 kJ/mol 
E) 0.112 kJ/mol 
A) 0.518 kJ/mol 
B) 27.4 kJ/mol 
C) 4.32 kJ/mol 
D) 0.928 kJ/mol 
E) 0.112 kJ/mol

Question 12

What would be the appropriate equilibrium temperature of a system obtained by adding 25.0 g of ice at 0 °C to 250.0 mL of "hot" (80 °C)coffee,assuming that the heat capacity and density of the coffee are the same as for pure water (4.18 J g-1 °C-1 and 0.997 g mL-1),and also assuming negligible heat transfer with the surroundings? [For water,ΔfusH = 6.02 kJ/mol.]

Accepted Answer

A) 33 °C 
B) 40 °C 
C) 65 °C 
D) 73 °C 
E) 79 °C 
A) 33 °C 
B) 40 °C 
C) 65 °C 
D) 73 °C 
E) 79 °C

Question 13

Given the data below,determine the normal boiling point of COCl2.
P1 = 100 mmHg,t1 = -35.6 °C,ΔvapH = 27.4 kJ/mol

Accepted Answer

A) 278 °C 
B) -65.1 °C 
C) -36.4 °C 
D) 5.0 °C 
E) -5.0 °C 
A) 278 °C 
B) -65.1 °C 
C) -36.4 °C 
D) 5.0 °C 
E) -5.0 °C

Question 14

The phenomenon of supercooling refers to the existence of a metastable:

Accepted Answer

A) liquid at a temperature below that of its critical point 
B) liquid at a temperature below that of its sublimation point 
C) liquid at a temperature below that of its freezing point 
D) gas at a temperature below that of its critical point 
E) two-phase liquid/solid mixture at the freezing point 
A) liquid at a temperature below that of its critical point 
B) liquid at a temperature below that of its sublimation point 
C) liquid at a temperature below that of its freezing point 
D) gas at a temperature below that of its critical point 
E) two-phase liquid/solid mixture at the freezing point

Question 15

Coordination number is:

Accepted Answer

A) the number of atoms per unit cell 
B) the number of atoms in the corners of the unit cell 
C) the number of atoms in contact with a given atom 
D) the number of atoms in the holes of closest packed structures 
E) the number of layers in close packed structures 
A) the number of atoms per unit cell 
B) the number of atoms in the corners of the unit cell 
C) the number of atoms in contact with a given atom 
D) the number of atoms in the holes of closest packed structures 
E) the number of layers in close packed structures

Question 16

Which of the following compounds exhibits hydrogen bonding?

Accepted Answer

A) CH3Cl 
B) HI  
C) CH3OC  H3 
D) NH3     
A) CH3Cl 
B) HI  
C) CH3OC  H3 
D) NH3

Question 17

Which of the following compounds is the most viscous?
CH3CH2OH,CH3CH2CH2CH3,HOCH2CH2OH,CH3OCH2CH3

Accepted Answer

A) CH3CH2OH 
B) CH3CH2CH2CH3 
C) CH3OCH2CH3 
D) HOCH2CH2OH 
A) CH3CH2OH 
B) CH3CH2CH2CH3 
C) CH3OCH2CH3 
D) HOCH2CH2OH

Question 18

Given the following information,calculate ΔH° (in kcal mol-1)for: 
NaI(s)→ Na+(g)+ I-(g)

Accepted Answer

A) 816 kcal mol-1 
B) 823 kcal mol-1 
C) 562 kcal mol-1 
D) 746 kcal mol-1 
E) 798 kcal mol-1 
A) 816 kcal mol-1 
B) 823 kcal mol-1 
C) 562 kcal mol-1 
D) 746 kcal mol-1 
E) 798 kcal mol-1

Question 19

Arrange the following compounds in order of increasing boiling point:
I.1-propanol,CH3CH2CH2OH;
II.1,2-propanediol,CH3CH(OH)CH2OH;
III.1,2,3-propanetriol, (glycerol),HOCH2CH(OH)CH2OH.

Accepted Answer

A) II,III,I 
B) I,II,III 
C) III,I,II 
D) III,II,I 
E) I,III,II 
A) II,III,I 
B) I,II,III 
C) III,I,II 
D) III,II,I 
E) I,III,II

Question 20

Which of the following ionic compounds should have the highest melting point?

Accepted Answer

A) NaI 
B) MgO 
C) NaCl 
D) LiBr 
E) CaS 
A) NaI 
B) MgO 
C) NaCl 
D) LiBr 
E) CaS

Exam 12: Intermolecular Forces: Liquids and Solids

Consider a parallelepiped with all edges being equal in length.There is an atom at each corner and one in the absolute center.This is a ________.

Which of the following compounds exhibits only dispersion and dipole-dipole intermolecular interactions?

The heat of vaporization of water at 100 °C is 40.66 kJ mol-1.Calculate the quantity of heat that is absorbed/released when 9.00 g of steam condenses to liquid water at 100 °C.

A crystal does not conduct electricity,yet its melt and aqueous solutions do.It is hard and brittle and melts at a high temperature.What type of crystal is it?

According to the phase diagram given,which of the following statements is INCORRECT?

Liquid and vapor phases of a substance become indistinguishable at the ________.

Surface tension is thought to be due to:

Given the data below,determine the molar enthalpy of vaporization of liquid Rb. Rb,P1 = 1.00 mmHg,t1 = 297 °C,P2 = 400 mmHg,t2 = 620 °C

Below are given the Lewis structures of five molecules.Which one displays the LEAST hydrogen bonding?

The enthalpy of condensation is equal to,but opposite in sign from,the enthalpy of ________.

Given the data below,determine the molar enthalpy of vaporization of COCl2. COCl2,P1 = 40 mmHg,t1 = -50.3 °C,P2 = 100 mmHg,t2 = -35.6 °C

Given the data below,determine the normal boiling point of COCl2. P1 = 100 mmHg,t1 = -35.6 °C,ΔvapH = 27.4 kJ/mol

The phenomenon of supercooling refers to the existence of a metastable:

Coordination number is:

Which of the following compounds exhibits hydrogen bonding?

Which of the following compounds is the most viscous? CH3CH2OH,CH3CH2CH2CH3,HOCH2CH2OH,CH3OCH2CH3

Given the following information,calculate ΔH° (in kcal mol-1)for: NaI(s)→ Na+(g)+ I-(g)

Arrange the following compounds in order of increasing boiling point: I.1-propanol,CH3CH2CH2OH; II.1,2-propanediol,CH3CH(OH)CH2OH; III.1,2,3-propanetriol, (glycerol),HOCH2CH(OH)CH2OH.

Which of the following ionic compounds should have the highest melting point?

Matter: Its Properties and Measurement

Atoms and the Atomic Theory

Chemical Compounds

Chemical Reactions

Introduction to Reactions in Aqueous Solutions

Gases

Thermochemistry

Electrons in Atoms

The Periodic Table and Some Atomic Properties

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Valence Bond and Molecular Orbital Theories

Spontaneous Change: Entropy and Gibbs Energy

Solutions and Their Physical Properties

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acidbase Equilibria

Solubility and Complex-Ion Equilibria

Electrochemistry

Chemical Kinetics

Chemistry of the Main-Group Elements I: Groups 1,2,13,and 14

Chemistry of the Main-Group Elements Ii: Groups 18,17,16,15,and Hydrogen

The Transition Elements

Complex Ions and Coordination Compounds

Nuclear Chemistry

Structures of Organic Compounds

Reactions of Organic Compounds

Chemistry of the Living State

Filters

The heat of vaporization of water at 100 °C is 40.66 kJ mol^-1.Calculate the quantity of heat that is absorbed/released when 9.00 g of steam condenses to liquid water at 100 °C.

Given the data below,determine the molar enthalpy of vaporization of liquid Rb. Rb,P₁ = 1.00 mmHg,t₁ = 297 °C,P₂ = 400 mmHg,t₂ = 620 °C

Given the data below,determine the molar enthalpy of vaporization of COCl₂. COCl₂,P₁ = 40 mmHg,t₁ = -50.3 °C,P₂ = 100 mmHg,t₂ = -35.6 °C

Given the data below,determine the normal boiling point of COCl₂. P₁ = 100 mmHg,t₁ = -35.6 °C,Δ_vapH = 27.4 kJ/mol

Which of the following compounds is the most viscous? CH₃CH₂OH,CH₃CH₂CH₂CH₃,HOCH₂CH₂OH,CH₃OCH₂CH₃

Given the following information,calculate ΔH° (in kcal mol^-1)for: NaI(s)→ Na⁺(g)+ I^-(g)

Arrange the following compounds in order of increasing boiling point: I.1-propanol,CH₃CH₂CH₂OH; II.1,2-propanediol,CH₃CH(OH)CH₂OH; III.1,2,3-propanetriol, (glycerol),HOCH₂CH(OH)CH₂OH.