Question 1

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, 39,000 feet 
C)  Miami, sea level 
D)  Lhasa, Tibet, 11,975 feet 
E)  Denver, Colorado, 5,280 feet 
A)  Death Valley, 282 feet below sea level 
B)  A pressurized passenger jet, 39,000 feet 
C)  Miami, sea level 
D)  Lhasa, Tibet, 11,975 feet 
E)  Denver, Colorado, 5,280 feet

Question 2

What is the strongest type of intermolecular force present in CH3(CH2)4OH?

Accepted Answer

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

Question 3

Choose the pair of substances that are most likely to form a homogeneous solution.

Accepted Answer

A)  CBr4 and SF2 
B)  NF3 and SO2 
C)  CO and C6H14 
D)  NH2CH3 and CH4 
E)  None of the pairs above will form a homogeneous solution. 
A)  CBr4 and SF2 
B)  NF3 and SO2 
C)  CO and C6H14 
D)  NH2CH3 and CH4 
E)  None of the pairs above will form a homogeneous solution.

Question 4

Determine the normal boiling point of a substance whose vapor pressure is 55.1 mm Hg at 35°C and has a ΔHvap of 32.1 kJ/mol.

Accepted Answer

A)  255 K 
B)  368 K 
C)  412 K 
D)  390. K 
E)  466 K 
A)  255 K 
B)  368 K 
C)  412 K 
D)  390. K 
E)  466 K

Question 5

Why is the ΔHvap higher than ΔHfus for a given compound?

Accepted Answer

Vaporizing a substance require

Question 6

Based on the figure above,the boiling point of diethyl ether under an external pressure of 0.855 atm is ________°C.

Accepted Answer

A)  0 
B)  10 
C)  20 
D)  30 
E)  40 
A)  0 
B)  10 
C)  20 
D)  30 
E)  40

Question 7

Based on the figure above,the boiling point of water under an external pressure of 0.493 atm is ________°C.

Accepted Answer

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

Question 8

Capillary action occurs because

Accepted Answer

A)  cohesive forces are greater than adhesive forces. 
B)  adhesive forces equal adhesive forces. 
C)  adhesive forces are greater than cohesive forces. 
D)  surface tension is high. 
E)  surface tension is low. 
A)  cohesive forces are greater than adhesive forces. 
B)  adhesive forces equal adhesive forces. 
C)  adhesive forces are greater than cohesive forces. 
D)  surface tension is high. 
E)  surface tension is low.

Question 9

What type of intermolecular force causes the dissolution of CaCl2 in water?

Accepted Answer

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

Question 10

Which one of the following has a definite shape and volume?

Accepted Answer

A)  gas 
B)  liquid 
C)  solid 
D)  none of the above 
E)  all of the above 
A)  gas 
B)  liquid 
C)  solid 
D)  none of the above 
E)  all of the above

Question 11

The freezing point of water is ________.

Accepted Answer

A)  32°F 
B)  32°C 
C)  212°C 
D)  100°F 
E)  273°C 
A)  32°F 
B)  32°C 
C)  212°C 
D)  100°F 
E)  273°C

Question 12

Identify the compound that has hydrogen bonding.

Accepted Answer

A)  (CH3)3N 
B)  Cl2 
C)  CH3CH3 
D)  HI 
E)  H2O  
A)  (CH3)3N 
B)  Cl2 
C)  CH3CH3 
D)  HI 
E)  H2O

Question 13

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 14

Which of the following substances would you predict to have the highest ΔHvap?

Accepted Answer

A)  Rn 
B)  C6H6 
C)  SiF4 
D)  Br2 
E)  H2 
A)  Rn 
B)  C6H6 
C)  SiF4 
D)  Br2 
E)  H2

Question 15

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

Accepted Answer

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

Question 16

Choose the substance with the lowest viscosity.

Accepted Answer

A)  F3CCF3 
B)  F2CHCH2F 
C)  F2CHCHF2 
D)  FCH2CH2F 
E)  F3CCHF2 
A)  F3CCF3 
B)  F2CHCH2F 
C)  F2CHCHF2 
D)  FCH2CH2F 
E)  F3CCHF2

Question 17

The normal boiling point for H Br  is higher than the normal boiling point for H Cl.This can be explained by

Accepted Answer

A)  larger dipole-dipole forces for H Br . 
B)  larger dispersion forces for H Br . 
C)  larger hydrogen-bond forces for H Br . 
D)  larger dipole-dipole forces, larger dispersion forces, and larger hydrogen-bond forces for H Br . 
A)  larger dipole-dipole forces for H Br . 
B)  larger dispersion forces for H Br . 
C)  larger hydrogen-bond forces for H Br . 
D)  larger dipole-dipole forces, larger dispersion forces, and larger hydrogen-bond forces for H Br .

Question 18

The normal boiling point of water is ________ at sea level.

Accepted Answer

A)  0°F 
B)  32°C 
C)  212 K 
D)  212°F 
E)  273°F 
A)  0°F 
B)  32°C 
C)  212 K 
D)  212°F 
E)  273°F

Question 19

Choose the substance with the lowest surface tension.

Accepted Answer

A)  CH3SeCH2CH3 
B)  CH3CH2CH2CH3 
C)  C6H6 
D)  H2Se 
E)  (CH3)2SO 
A)  CH3SeCH2CH3 
B)  CH3CH2CH2CH3 
C)  C6H6 
D)  H2Se 
E)  (CH3)2SO

Question 20

In DNA,cytosine and guanine hydrogen bond to each other with ________ hydrogen bonds.

Accepted Answer

A)  4 
B)  0 
C)  1 
D)  3 
E)  2 
A)  4 
B)  0 
C)  1 
D)  3 
E)  2

Exam 11: Liquids,solids,and Intermolecular Forces

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

What is the strongest type of intermolecular force present in CH3(CH2)4OH?

Choose the pair of substances that are most likely to form a homogeneous solution.

Determine the normal boiling point of a substance whose vapor pressure is 55.1 mm Hg at 35°C and has a ΔHvap of 32.1 kJ/mol.

Why is the ΔHvap higher than ΔHfus for a given compound?

Based on the figure above,the boiling point of diethyl ether under an external pressure of 0.855 atm is ________°C.

Based on the figure above,the boiling point of water under an external pressure of 0.493 atm is ________°C.

Capillary action occurs because

What type of intermolecular force causes the dissolution of CaCl2 in water?

Which one of the following has a definite shape and volume?

The freezing point of water is ________.

Identify the compound that has hydrogen bonding.

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

Which of the following substances would you predict to have the highest ΔHvap?

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

Choose the substance with the lowest viscosity.

The normal boiling point for H Br is higher than the normal boiling point for H Cl.This can be explained by

The normal boiling point of water is ________ at sea level.

Choose the substance with the lowest surface tension.

In DNA,cytosine and guanine hydrogen bond to each other with ________ hydrogen bonds.

Matter, measurement, and Problem Solving

Atoms and Elements

Molecules,compounds,and Chemical Equations

Chemical Quantities and Aqueous Reactions

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding Ii: Molecular Shapes,valence Bond Theory,

Solids and Modern Materials

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry

Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

Filters

What is the strongest type of intermolecular force present in CH₃(CH₂)₄OH?

Determine the normal boiling point of a substance whose vapor pressure is 55.1 mm Hg at 35°C and has a ΔH_vap of 32.1 kJ/mol.

Why is the ΔH_vap higher than ΔH_fusfor a given compound?

What type of intermolecular force causes the dissolution of CaCl₂ in water?

Which of the following substances would you predict to have the highest ΔH_vap?

The normal boiling point for HBr is higher than the normal boiling point for HCl.This can be explained by