Question 1

Which substance below has the strongest intermolecular forces?

Accepted Answer

A) A2X,ΔHvap = 39.6 kJ/mol 
B) BY2,ΔHvap = 26.7 kJ/mol 
C) C3X2,ΔHvap = 36.4 kJ/mol 
D) DX2,ΔHvap = 23.3 kJ/mol 
E) EY3,ΔHvap = 21.5 kJ/mol 
A) A2X,ΔHvap = 39.6 kJ/mol 
B) BY2,ΔHvap = 26.7 kJ/mol 
C) C3X2,ΔHvap = 36.4 kJ/mol 
D) DX2,ΔHvap = 23.3 kJ/mol 
E) EY3,ΔHvap = 21.5 kJ/mol A

Question 2

Place the following compounds in order of decreasing strength of intermolecular forces.
HF O2 CO2

Accepted Answer

A) HF > CO2 > O2 
B) HF > O2 > CO2  
C) O2 > CO2 > HF 
D) CO2 > HF > O2 
E) CO2 > O2 > HF 
A) HF > CO2 > O2 
B) HF > O2 > CO2  
C) O2 > CO2 > HF 
D) CO2 > HF > O2 
E) CO2 > O2 > HF A

Question 3

Give the term for the temperature at which the gas and liquid phases form a supercritical fluid.

Accepted Answer

A) absolute temperature 
B) definite temperature 
C) fluid temperature 
D) critical temperature 
E) solid temperature 
A) absolute temperature 
B) definite temperature 
C) fluid temperature 
D) critical temperature 
E) solid temperature D

Question 4

Which is expected to have the largest dispersion forces?

Accepted Answer

A) C3H8 
B) C12H26 
C) F2 
D) Be Cl2 
A) C3H8 
B) C12H26 
C) F2 
D) Be Cl2

Question 5

How much energy is required to heat 87.1 g acetone (molar mass = 58.08 g/mol)from a solid at -154.0°C to a liquid at -42.0°C? The following physical data may be useful.
ΔHfus = 7.27 kJ/mol
Cliq = 2.16 J/g°C
Cgas = 1.29 J/g°C
Csol = 1.65 J/g°C
Tmelting = -95.0°C

Accepted Answer

A) 8.48 kJ 
B) 18.5 kJ 
C) 32.2 kJ 
D) 29.4 kJ 
E) 9.97 kJ 
A) 8.48 kJ 
B) 18.5 kJ 
C) 32.2 kJ 
D) 29.4 kJ 
E) 9.97 kJ

Question 6

Which of the following is considered an ionic solid?

Accepted Answer

A) (NH4)2CO3 
B) CCl4 
C) SeBr2 
D) XeF4 
E) None of these is an ionic solid. 
A) (NH4)2CO3 
B) CCl4 
C) SeBr2 
D) XeF4 
E) None of these is an ionic solid.

Question 7

What is the edge length of a face-centered cubic unit cell made up of atoms having a radius of 128 pm?

Accepted Answer

A) 181 pm 
B) 362 pm 
C) 512 pm 
D) 1020 pm 
A) 181 pm 
B) 362 pm 
C) 512 pm 
D) 1020 pm

Question 8

What type of intermolecular force causes the dissolution of NaCl 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 9

Vanadium crystallizes in a body-centered cubic structure and has an atomic radius of 131 pm.Determine the density of vanadium,if the edge length of a bcc structure is 4r/  
.

Accepted Answer

A) 3.06 g/cm3 
B) 12.2 g/cm3 
C) 6.11 g/cm3 
D) 2.77 g/cm3 
E) 8.46 g/cm3 
A) 3.06 g/cm3 
B) 12.2 g/cm3 
C) 6.11 g/cm3 
D) 2.77 g/cm3 
E) 8.46 g/cm3

Question 10

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

Accepted Answer

A) NaCl and Hg 
B) C3H8 and C2H5OH 
C) LiF and C6H14 
D) Br2 and PF3 
E) NH3 and CH3OH 
A) NaCl and Hg 
B) C3H8 and C2H5OH 
C) LiF and C6H14 
D) Br2 and PF3 
E) NH3 and CH3OH

Question 11

Place the following compounds in order of decreasing strength of intermolecular forces.
I.CH3CH2CH2CH2CH2CH3 
II.(CH3)3CCH3
III.(CH3)3CCH2CH3

Accepted Answer

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

Question 12

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

Accepted Answer

A) SCl2 
B) C2H6 
C) CH3OH 
D) CH2F2 
E) None of the above compounds exhibit hydrogen bonding. 
A) SCl2 
B) C2H6 
C) CH3OH 
D) CH2F2 
E) None of the above compounds exhibit hydrogen bonding.

Question 13

How much energy must be removed from a 94.4 g sample of benzene (molar mass = 78.11 g/mol)at 322.0 K to solidify the sample and lower the temperature to 205.0 K? The following physical data may be useful.
ΔHvap = 33.9 kJ/mol
ΔHfus = 9.8 kJ/mol
Cliq = 1.73 J/g°C
Cgas = 1.06 J/g°C
Csol = 1.51 J/g°C
Tmelting = 279.0 K
Tboiling = 353.0 K

Accepted Answer

A) 17.6 kJ 
B) 11.8 kJ 
C) 70.2 kJ 
D) 10.5 kJ 
E) 29.4 kJ 
A) 17.6 kJ 
B) 11.8 kJ 
C) 70.2 kJ 
D) 10.5 kJ 
E) 29.4 kJ

Question 14

How much energy must be removed from a 125 g sample of benzene (molar mass = 78.11 g/mol)at 425.0 K to liquify the sample and lower the temperature to 335.0 K? The following physical data may be useful.
ΔHvap = 33.9 kJ/mol
ΔHfus = 9.8 kJ/mol
Cliq = 1.73 J/g°C
Cgas = 1.06 J/g°C
Csol = 1.51 J/g°C
Tmelting = 279.0 K
Tboiling = 353.0 K

Accepted Answer

A) 38.9 kJ 
B) 95.4 kJ 
C) 67.7 kJ 
D) 54.3 kJ 
E) 74.4 kJ 
A) 38.9 kJ 
B) 95.4 kJ 
C) 67.7 kJ 
D) 54.3 kJ 
E) 74.4 kJ

Question 15

What fraction of an atom is at each corner a body-centered cubic unit cell?

Accepted Answer

A) 1/8 
B) 1/4 
C) 1/6 
D) 1/2 
A) 1/8 
B) 1/4 
C) 1/6 
D) 1/2

Question 16

How much energy is required to vaporize 48.7 g of dichloromethane (CH2Cl2)at its boiling point,if its ΔHvap is 31.6 kJ/mol?

Accepted Answer

A) 31.2 kJ 
B) 6.49 kJ 
C) 55.1 kJ 
D) 15.4 kJ 
E) 18.1 kJ 
A) 31.2 kJ 
B) 6.49 kJ 
C) 55.1 kJ 
D) 15.4 kJ 
E) 18.1 kJ

Question 17

Choose the molecule or compound that exhibits dispersion forces as its strongest intermolecular force.

Accepted Answer

A) Cl2 
B) CO 
C) HF 
D) NaCl 
E) All of these have intermolecular forces stronger than dispersion. 
A) Cl2 
B) CO 
C) HF 
D) NaCl 
E) All of these have intermolecular forces stronger than dispersion.

Question 18

Define viscosity.

Accepted Answer

Viscosity

Question 19

Consider the phase diagram below.If the dashed line at 1 atm of pressure is followed from 100 to 500°C,what phase changes will occur (in order of increasing temperature)?

Accepted Answer

A) condensation,followed by vaporization 
B) sublimation,followed by deposition 
C) vaporization,followed by deposition 
D) fusion,followed by vaporization 
E) No phase change will occur under the conditions specified. 
A) condensation,followed by vaporization 
B) sublimation,followed by deposition 
C) vaporization,followed by deposition 
D) fusion,followed by vaporization 
E) No phase change will occur under the conditions specified.

Question 20

Which of the following statements is true?

Accepted Answer

A) Vapor pressure increases with temperature. 
B) Hydrogen bonds are stronger than covalent bonds. 
C) Intermolecular forces hold the atoms in molecules together. 
D) Dispersion forces are generally stronger than dipole-dipole forces. 
E) None of the above are true. 
A) Vapor pressure increases with temperature. 
B) Hydrogen bonds are stronger than covalent bonds. 
C) Intermolecular forces hold the atoms in molecules together. 
D) Dispersion forces are generally stronger than dipole-dipole forces. 
E) None of the above are true.

Which substance below has the strongest intermolecular forces?

Place the following compounds in order of decreasing strength of intermolecular forces. HF O₂CO₂

Give the term for the temperature at which the gas and liquid phases form a supercritical fluid.

Which is expected to have the largest dispersion forces?

How much energy is required to heat 87.1 g acetone (molar mass = 58.08 g/mol)from a solid at -154.0°C to a liquid at -42.0°C? The following physical data may be useful. ΔH_fus = 7.27 kJ/mol C_liq = 2.16 J/g°C C_gas= 1.29 J/g°C C_sol = 1.65 J/g°C T_melting= -95.0°C

Which of the following is considered an ionic solid?

What is the edge length of a face-centered cubic unit cell made up of atoms having a radius of 128 pm?

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

Vanadium crystallizes in a body-centered cubic structure and has an atomic radius of 131 pm.Determine the density of vanadium,if the edge length of a bcc structure is 4r/ .

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

Place the following compounds in order of decreasing strength of intermolecular forces. I.CH₃CH₂CH₂CH₂CH₂CH₃ II.(CH₃)₃CCH₃ III.(CH₃)₃CCH₂CH₃

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

What fraction of an atom is at each corner a body-centered cubic unit cell?

How much energy is required to vaporize 48.7 g of dichloromethane (CH₂Cl₂)at its boiling point,if its ΔH_vap is 31.6 kJ/mol?

Choose the molecule or compound that exhibits dispersion forces as its strongest intermolecular force.

Define viscosity.

Consider the phase diagram below.If the dashed line at 1 atm of pressure is followed from 100 to 500°C,what phase changes will occur (in order of increasing temperature)?

Which of the following statements is true?

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, and

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Filters

Exam 11: Liquids, Solids, and Intermolecular Forces

Which substance below has the strongest intermolecular forces?

Place the following compounds in order of decreasing strength of intermolecular forces. HF O2 CO2

Give the term for the temperature at which the gas and liquid phases form a supercritical fluid.

Which is expected to have the largest dispersion forces?

How much energy is required to heat 87.1 g acetone (molar mass = 58.08 g/mol)from a solid at -154.0°C to a liquid at -42.0°C? The following physical data may be useful. ΔHfus = 7.27 kJ/mol Cliq = 2.16 J/g°C Cgas = 1.29 J/g°C Csol = 1.65 J/g°C Tmelting = -95.0°C

Which of the following is considered an ionic solid?

What is the edge length of a face-centered cubic unit cell made up of atoms having a radius of 128 pm?

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

Vanadium crystallizes in a body-centered cubic structure and has an atomic radius of 131 pm.Determine the density of vanadium,if the edge length of a bcc structure is 4r/ .

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

Place the following compounds in order of decreasing strength of intermolecular forces. I.CH3CH2CH2CH2CH2CH3 II.(CH3)3CCH3 III.(CH3)3CCH2CH3

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

What fraction of an atom is at each corner a body-centered cubic unit cell?

How much energy is required to vaporize 48.7 g of dichloromethane (CH2Cl2)at its boiling point,if its ΔHvap is 31.6 kJ/mol?

Choose the molecule or compound that exhibits dispersion forces as its strongest intermolecular force.

Define viscosity.

Consider the phase diagram below.If the dashed line at 1 atm of pressure is followed from 100 to 500°C,what phase changes will occur (in order of increasing temperature)?

Which of the following statements is true?

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, and

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Filters

Place the following compounds in order of decreasing strength of intermolecular forces. HF O₂CO₂

How much energy is required to heat 87.1 g acetone (molar mass = 58.08 g/mol)from a solid at -154.0°C to a liquid at -42.0°C? The following physical data may be useful. ΔH_fus = 7.27 kJ/mol C_liq = 2.16 J/g°C C_gas= 1.29 J/g°C C_sol = 1.65 J/g°C T_melting= -95.0°C

Place the following compounds in order of decreasing strength of intermolecular forces. I.CH₃CH₂CH₂CH₂CH₂CH₃ II.(CH₃)₃CCH₃ III.(CH₃)₃CCH₂CH₃

How much energy is required to vaporize 48.7 g of dichloromethane (CH₂Cl₂)at its boiling point,if its ΔH_vap is 31.6 kJ/mol?