Question 1

Together, liquids and solids constitute ________ phases of matter.

Accepted Answer

A) the compressible 
B) the fluid 
C) the condensed 
D) all of the 
E) the disordered 
A) the compressible 
B) the fluid 
C) the condensed 
D) all of the 
E) the disordered

Question 2

Which of the following is most likely to exhibit liquid-crystalline behavior?

Accepted Answer

A) CH3CH2-C(CH3)2-CH2CH3 
B) CH3CH2CH2CH2CH2CH2CH2CH3 
C) CH3CH2CH2CH2CH2-     
D)    
E)    
A) CH3CH2-C(CH3)2-CH2CH3 
B) CH3CH2CH2CH2CH2CH2CH2CH3 
C) CH3CH2CH2CH2CH2-     
D)    
E)

Question 3

The slope of a plot of the natural log of the vapor pressure of a substance versus 1/T is ________.

Accepted Answer

A) ΔHvap 
B) -ΔHvap 
C)    
D) -   
E)    
A) ΔHvap 
B) -ΔHvap 
C)    
D) -   
E)

Question 4

Under ordinary conditions, a substance will sublime rather than melt if its triple point occurs at a pressure above atmospheric pressure.

Accepted Answer

A) True 
 B)False

Question 5

Which statements about viscosity are true? (i)Viscosity increases as temperature decreases.
(ii)Viscosity increases as molecular weight increases.
(iii)Viscosity increases as intermolecular forces increase.

Accepted Answer

A) (i)only 
B) (ii)and (iii) 
C) (i)and (iii) 
D) none 
E) all 
A) (i)only 
B) (ii)and (iii) 
C) (i)and (iii) 
D) none 
E) all

Question 6

The boiling points of normal hydrocarbons are higher than those of branched hydrocarbons of similar molecular weight because the London-dispersion forces between normal hydrocarbons are greater than those between branched hydrocarbons.

Accepted Answer

A) True 
 B)False

Question 7

-Based on the figure above, the boiling point of water under an external pressure of 0.211 atm is ________ °C.

Accepted Answer

A) 60 
B) 40 
C) 70 
D) 80 
E) 90 
A) 60 
B) 40 
C) 70 
D) 80 
E) 90

Question 8

-On the phase diagram shown above, segment ________ corresponds to the conditions of temperature and pressure under which the solid and the gas of the substance are in equilibrium.

Accepted Answer

A) AB 
B) AC 
C) AD 
D) CD 
E) BC 
A) AB 
B) AC 
C) AD 
D) CD 
E) BC

Question 9

The ease with which the charge distribution in a molecule can be distorted by an external electrical field is called the ________.

Accepted Answer

A) electronegativity 
B) hydrogen bonding 
C) polarizability 
D) volatility 
E) viscosity 
A) electronegativity 
B) hydrogen bonding 
C) polarizability 
D) volatility 
E) viscosity

Question 10

-The heating curve shown was generated by measuring the heat flow and temperature for a solid as it was heated. The slope of the ________ segment corresponds to the heat capacity of the liquid of the substance.

Accepted Answer

A) AB 
B) BC 
C) CD 
D) DE 
E) EF 
A) AB 
B) BC 
C) CD 
D) DE 
E) EF

Question 11

Molecules containing only single bonds do not exhibit liquid-crystal behavior because free rotation can occur around single bonds making these molecules flexible.

Accepted Answer

A) True 
 B)False

Question 12

Calculate the enthalpy change (in kJ)associated with the conversion of 25.0 grams of ice at -4.00 °C to water vapor at 109.0 °C. The specific heats of ice, water, and steam are 2.09 J/g-K, 4.18 J/g-K, and 1.84 J/g-K, respectively. For H2O, ΔHfus = 6.01 kJ/mol and ΔHvap = 40.67 kJ/mol.

Accepted Answer

A) 64.8 
B) 75.9 
C) 11100 
D) 12000 
E) 112 
A) 64.8 
B) 75.9 
C) 11100 
D) 12000 
E) 112

Question 13

Which of the following has dispersion forces as its only intermolecular force?

Accepted Answer

A) CH4 
B) HCl 
C) C6H13NH2 
D) NaCl 
E) CH3Cl 
A) CH4 
B) HCl 
C) C6H13NH2 
D) NaCl 
E) CH3Cl

Question 14

________ are particularly polarizable.

Accepted Answer

A) Small nonpolar molecules 
B) Small polar molecules 
C) Large nonpolar molecules 
D) Large polar molecules 
E) Large molecules, regardless of their polarity, 
A) Small nonpolar molecules 
B) Small polar molecules 
C) Large nonpolar molecules 
D) Large polar molecules 
E) Large molecules, regardless of their polarity,

Question 15

Which compound has the strongest intermolecular forces?

Accepted Answer

A) CBr4 
B) C12H26 
C) CI4 
D) N2 
E) O2 
A) CBr4 
B) C12H26 
C) CI4 
D) N2 
E) O2

Question 16

Which one of the following exhibits dipole-dipole attraction between molecules?

Accepted Answer

A) NH3 
B) CF4 
C) C10H22 
D) O2 
E) SF6 
A) NH3 
B) CF4 
C) C10H22 
D) O2 
E) SF6

Question 17

-On the phase diagram shown above, the coordinates of point ________ correspond to the triple point.

Accepted Answer

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

Question 18

Viscosity is ________.

Accepted Answer

A) the "skin" on a liquid surface caused by intermolecular attraction 
B) the resistance to flow 
C) the same as density 
D) inversely proportional to molar mass 
E) unaffected by temperature 
A) the "skin" on a liquid surface caused by intermolecular attraction 
B) the resistance to flow 
C) the same as density 
D) inversely proportional to molar mass 
E) unaffected by temperature

Question 19

Which statement is true about liquids but not true about solids?

Accepted Answer

A) They flow and are highly ordered. 
B) They are highly ordered and not compressible. 
C) They flow and are compressible. 
D) They assume both the volume and the shape of their containers. 
E) They flow and are not compressible. 
A) They flow and are highly ordered. 
B) They are highly ordered and not compressible. 
C) They flow and are compressible. 
D) They assume both the volume and the shape of their containers. 
E) They flow and are not compressible.

Question 20

What is the predominant intermolecular force in BaBr2?

Accepted Answer

A) ionic bonding 
B) ion-dipole attraction 
C) dipole-dipole attraction 
D) hydrogen bonding 
E) London-dispersion forces 
A) ionic bonding 
B) ion-dipole attraction 
C) dipole-dipole attraction 
D) hydrogen bonding 
E) London-dispersion forces

Exam 11: Liquids and Intermolecular Forces

Together, liquids and solids constitute ________ phases of matter.

Which of the following is most likely to exhibit liquid-crystalline behavior?

The slope of a plot of the natural log of the vapor pressure of a substance versus 1/T is ________.

Under ordinary conditions, a substance will sublime rather than melt if its triple point occurs at a pressure above atmospheric pressure.

Which statements about viscosity are true? (i)Viscosity increases as temperature decreases. (ii)Viscosity increases as molecular weight increases. (iii)Viscosity increases as intermolecular forces increase.

The boiling points of normal hydrocarbons are higher than those of branched hydrocarbons of similar molecular weight because the London-dispersion forces between normal hydrocarbons are greater than those between branched hydrocarbons.

-Based on the figure above, the boiling point of water under an external pressure of 0.211 atm is ________ °C.

-On the phase diagram shown above, segment ________ corresponds to the conditions of temperature and pressure under which the solid and the gas of the substance are in equilibrium.

The ease with which the charge distribution in a molecule can be distorted by an external electrical field is called the ________.

-The heating curve shown was generated by measuring the heat flow and temperature for a solid as it was heated. The slope of the ________ segment corresponds to the heat capacity of the liquid of the substance.

Molecules containing only single bonds do not exhibit liquid-crystal behavior because free rotation can occur around single bonds making these molecules flexible.

Calculate the enthalpy change (in kJ)associated with the conversion of 25.0 grams of ice at -4.00 °C to water vapor at 109.0 °C. The specific heats of ice, water, and steam are 2.09 J/g-K, 4.18 J/g-K, and 1.84 J/g-K, respectively. For H2O, ΔHfus = 6.01 kJ/mol and ΔHvap = 40.67 kJ/mol.

Which of the following has dispersion forces as its only intermolecular force?

________ are particularly polarizable.

Which compound has the strongest intermolecular forces?

Which one of the following exhibits dipole-dipole attraction between molecules?

-On the phase diagram shown above, the coordinates of point ________ correspond to the triple point.

Viscosity is ________.

Which statement is true about liquids but not true about solids?

What is the predominant intermolecular force in BaBr2?

Introduction: Matter and Measurement

Atoms, Molecules, and Ions

Stoichiometry: Calculations With Chemical Formulas and Equations

Aqueous Reactions and Solution Stoichiometry

Thermochemistry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Molecular Geometry and Bonding Theories

Gases

Solids and Modern Materials

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Aqueous Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Chemistry of the Nonmetals

Transition Metals and Coordination Chemistry

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Calculate the enthalpy change (in kJ)associated with the conversion of 25.0 grams of ice at -4.00 °C to water vapor at 109.0 °C. The specific heats of ice, water, and steam are 2.09 J/g-K, 4.18 J/g-K, and 1.84 J/g-K, respectively. For H₂O, ΔH_fus = 6.01 kJ/mol and ΔH_vap = 40.67 kJ/mol.

What is the predominant intermolecular force in BaBr₂?