Question 1

The two strands in DNA are held together by

Accepted Answer

A)  dispersion forces. 
B)  dipole-dipole forces. 
C)  hydrogen bonding. 
D)  ion-dipole forces. 
A)  dispersion forces. 
B)  dipole-dipole forces. 
C)  hydrogen bonding. 
D)  ion-dipole forces.

Question 2

Choose the compound that exhibits hydrogen bonding as its strongest intermolecular force.

Accepted Answer

A)  NBr3 
B)  C8H18 
C)  CH3CH2SeH 
D)  CH2Br2 
E)  None of the above compounds exhibit hydrogen bonding. 
A)  NBr3 
B)  C8H18 
C)  CH3CH2SeH 
D)  CH2Br2 
E)  None of the above compounds exhibit hydrogen bonding.

Question 3

Place the following compounds in order of decreasing strength of intermolecular forces. HF H2 CO2

Accepted Answer

A)  HF > CO2 > H2 
B)  HF > H2 > CO2  
C)  H2 > CO2 > HF 
D)  CO2 > HF > H2 
E)  CO2 > H2 > HF 
A)  HF > CO2 > H2 
B)  HF > H2 > CO2  
C)  H2 > CO2 > HF 
D)  CO2 > HF > H2 
E)  CO2 > H2 > HF

Question 4

The enthalpy change for converting 1.00 mol of ice at -50.0°C to water at 70.0°C is ________ kJ.The specific heats of ice,water,and steam are 2.09 J/gK,4.18 J/gK,and 1.84 J/gK,respectively.For H2O,ΔHfus = 6.01 kJ/mol,and ΔHvap = 40.67 kJ/mol.

Accepted Answer

A)  12.28 
B)  6.41 
C)  13.16 
D)  7154 
E)  9.40 
A)  12.28 
B)  6.41 
C)  13.16 
D)  7154 
E)  9.40

Question 5

How much energy is required to heat 36.0 g H2O from a liquid at 65°C to a gas at 115°C? The following physical data may be useful.
ΔHvap = 40.7 kJ/mol
Cliq = 4.18 J/g°C
Cgas = 2.01 J/g°C
Csol = 2.09 J/g°C
Tmelting = 0°C
Tboiling = 100°C

Accepted Answer

A)  63.5 kJ 
B)  87.7 kJ 
C)  10.9 kJ 
D)  52.7 kJ 
E)  91.7 kJ 
A)  63.5 kJ 
B)  87.7 kJ 
C)  10.9 kJ 
D)  52.7 kJ 
E)  91.7 kJ

Question 6

Identify the compound with the highest boiling point.

Accepted Answer

A)  CH4 
B)  NH3 
C)  HF 
D)  H2S 
E)  H2O 
A)  CH4 
B)  NH3 
C)  HF 
D)  H2S 
E)  H2O

Question 7

Which one of the following has a low density?

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 8

Place the following substances in order of increasing vapor pressure at a given temperature. NF3 NH3 BCl3

Accepted Answer

A)  NH3 3 3 
B)  NF3 3 3 
C)  BCl3 3 3 
D)  NH3 3 3 
E)  BCl3 3 3 
A)  NH3 3 3 
B)  NF3 3 3 
C)  BCl3 3 3 
D)  NH3 3 3 
E)  BCl3 3 3

Question 9

Define dynamic equilibrium.

Accepted Answer

Dynamic equilibrium

Question 10

Match between columns
                        Premises: CHS1U1B13S1U1B0OH
CHS1U1B13S1U1B0CHS1U1B13S1U1B0
LiI
CHS1U1B12S1U1B0FS1U1B12S1U1B0
LiI + HS1U1B12S1U1B0O

Accepted Answer

The Answer of dipole-dipole forces and ionic bond and dispersion is...

Question 11

In liquid propanol, CH3CH2CH2OH   
Which intermolecular forces are present?

Accepted Answer

A)  Dispersion, hydrogen bonding and dipole-dipole forces are present. 
B)  Only dipole-dipole and ion-dipole forces are present. 
C)  Only dispersion and dipole-dipole forces are present. 
D)  Only hydrogen bonding forces are present. 
A)  Dispersion, hydrogen bonding and dipole-dipole forces are present. 
B)  Only dipole-dipole and ion-dipole forces are present. 
C)  Only dispersion and dipole-dipole forces are present. 
D)  Only hydrogen bonding forces are present.

Question 12

What type of intermolecular force causes the dissolution of K F 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 13

Which of the following compounds has the highest boiling point?

Accepted Answer

A)  H2O 
B)  H Cl 
C)  H2S  
D)  N H3 
A)  H2O 
B)  H Cl 
C)  H2S  
D)  N H3

Question 14

Place the following substances in order of increasing vapor pressure at a given temperature. SF6 SiH4 SF4

Accepted Answer

A)  SF6 4 4 
B)  SiH4 4 6 
C)  SF6 4 4 
D)  SF4 6 4 
E)  SiH4 6 4 
A)  SF6 4 4 
B)  SiH4 4 6 
C)  SF6 4 4 
D)  SF4 6 4 
E)  SiH4 6 4

Question 15

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

Accepted Answer

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

Question 16

Choose the substance with the lowest viscosity.

Accepted Answer

A)  Cl3CCCl3 
B)  Cl2CHCH2Cl 
C)  Cl2CHCHCl2 
D)  ClCH2CH2Cl 
E)  Cl3CCHCl2 
A)  Cl3CCCl3 
B)  Cl2CHCH2Cl 
C)  Cl2CHCHCl2 
D)  ClCH2CH2Cl 
E)  Cl3CCHCl2

Question 17

Propanol has a normal boiling point of 97.8°C.At 400 torr,it has a boiling point of 82.0°C.What is the heat of vaporization?

Accepted Answer

A)  24.9 kJ/mol 
B)  38.7 kJ/mol 
C)  12.3 kJ/mol 
D)  52.7 kJ/mol 
E)  44.4 kJ/mol 
A)  24.9 kJ/mol 
B)  38.7 kJ/mol 
C)  12.3 kJ/mol 
D)  52.7 kJ/mol 
E)  44.4 kJ/mol

Question 18

Which of the following statements is FALSE?

Accepted Answer

A)  The rate of vaporization increases with increasing surface area. 
B)  The rate of vaporization increases with decreasing strength of intermolecular forces. 
C)  The rate of vaporization increases with increasing temperature. 
D)  Molecules with hydrogen bonding are more volatile than compounds with dipole-dipole forces. 
E)  None of the above are false. 
A)  The rate of vaporization increases with increasing surface area. 
B)  The rate of vaporization increases with decreasing strength of intermolecular forces. 
C)  The rate of vaporization increases with increasing temperature. 
D)  Molecules with hydrogen bonding are more volatile than compounds with dipole-dipole forces. 
E)  None of the above are false.

Question 19

Place the following substances in order of decreasing boiling point. N2 O2 H2

Accepted Answer

A)  O2 > H2 > N2 
B)  N2 > H2 > O2 
C)  N2 > O2 > H2 
D)  O2 > N2 > H2 
E)  H2 > N2 > O2 
A)  O2 > H2 > N2 
B)  N2 > H2 > O2 
C)  N2 > O2 > H2 
D)  O2 > N2 > H2 
E)  H2 > N2 > O2

Question 20

How many compounds,of the ones listed below,have hydrogen bonding?
CH3CH2CH2NH2  CH3CH2NHCH2CH3 (CH3CH2)2NCH2CH3

Accepted Answer

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

Exam 12: Liquids, Solids, and Intermolecular Forces

The two strands in DNA are held together by

Choose the compound that exhibits hydrogen bonding as its strongest intermolecular force.

Place the following compounds in order of decreasing strength of intermolecular forces. HF H2 CO2

The enthalpy change for converting 1.00 mol of ice at -50.0°C to water at 70.0°C is ________ kJ.The specific heats of ice,water,and steam are 2.09 J/gK,4.18 J/gK,and 1.84 J/gK,respectively.For H2O,ΔHfus = 6.01 kJ/mol,and ΔHvap = 40.67 kJ/mol.

How much energy is required to heat 36.0 g H2O from a liquid at 65°C to a gas at 115°C? The following physical data may be useful. ΔHvap = 40.7 kJ/mol Cliq = 4.18 J/g°C Cgas = 2.01 J/g°C Csol = 2.09 J/g°C Tmelting = 0°C Tboiling = 100°C

Identify the compound with the highest boiling point.

Which one of the following has a low density?

Place the following substances in order of increasing vapor pressure at a given temperature. NF3 NH3 BCl3

Define dynamic equilibrium.

In liquid propanol, CH3CH2CH2OH Which intermolecular forces are present?

What type of intermolecular force causes the dissolution of K F in water?

Which of the following compounds has the highest boiling point?

Place the following substances in order of increasing vapor pressure at a given temperature. SF6 SiH4 SF4

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

Choose the substance with the lowest viscosity.

Propanol has a normal boiling point of 97.8°C.At 400 torr,it has a boiling point of 82.0°C.What is the heat of vaporization?

Which of the following statements is FALSE?

Place the following substances in order of decreasing boiling point. N2 O2 H2

How many compounds,of the ones listed below,have hydrogen bonding? CH3CH2CH2NH2 CH3CH2NHCH2CH3 (CH3CH2)2NCH2CH3

Essentials: Units, Measurements, and Problem Solving

Atoms

The Quantum Mechanical Model of the Atom

Periodic Properties of the Elements

Molecules and Compounds

Chemical Bonding I

Chemical Bonding Ii

Chemical Reactions and Chemical Quantities

Introduction to Solutions and Aqueous Reactions

Thermochemistry

Gases

Crystalline 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

Transition Metals and Coordination Compounds

Filters

Place the following compounds in order of decreasing strength of intermolecular forces. HF H₂CO₂

The enthalpy change for converting 1.00 mol of ice at -50.0°C to water at 70.0°C is ________ kJ.The specific heats of ice,water,and steam are 2.09 J/gK,4.18 J/gK,and 1.84 J/gK,respectively.For H₂O,ΔH_fus = 6.01 kJ/mol,and ΔH_vap = 40.67 kJ/mol.

How much energy is required to heat 36.0 g H₂O from a liquid at 65°C to a gas at 115°C? The following physical data may be useful. ΔH_vap = 40.7 kJ/mol C_liq = 4.18 J/g°C C_gas= 2.01 J/g°C C_sol = 2.09 J/g°C T_melting= 0°C T_boiling = 100°C

Place the following substances in order of increasing vapor pressure at a given temperature. NF₃ NH₃BCl₃

In liquid propanol, CH₃CH₂CH₂OH Which intermolecular forces are present?

Place the following substances in order of increasing vapor pressure at a given temperature. SF₆ SiH₄ SF₄

Place the following substances in order of decreasing boiling point. N₂ O₂ H₂

How many compounds,of the ones listed below,have hydrogen bonding? CH₃CH₂CH₂NH₂ CH₃CH₂NHCH₂CH₃ (CH₃CH₂)₂NCH₂CH₃