Question 1

The forces that hold CO2 together in the solid state are:

Accepted Answer

A)  ionic bonds.
B)  dipole-dipole forces.
C)  London dispersion forces only.
D)  covalent bonds.
E)  attractions between nuclei and delocalized valence electrons. C

Question 2

Arrange the following substances in order of increasing boiling point: N2, H2, NH3, PH3

Accepted Answer

A)  H2 < N2 < PH3 <  NH3 
B)  N2 < H2 < PH3 <  NH3 
C)  H2 < N2 < NH3 <  PH3 
D)  N2 < PH3 <  NH3 < H2 
E)  NH3 < PH3 <  N2 < H2  A

Question 3

Rank the following substances in order of increasing intermolecular forces: He, HF, F2, Ne

Accepted Answer

A)  He 2 
B)  He 2 
C)  He 2 
D)  He 2  
E)  HF 2 < He C

Question 4

A solid substance has a moderate melting point, is fairly soft, and is a nonconductor.This substance is probably a(n) ________ solid.

Accepted Answer

A)  metallic
B)  ionic
C)  network
D)  nonpolar molecular
E)  polar molecular

Question 5

Which of the following molecules experience dipole-dipole forces?

Accepted Answer

A)  NO2 
B)  CO2 
C)  CBr4 
D)  SO3 
E)  all of these choices are correct

Question 6

Which of the following statements is correct?

Accepted Answer

A)  At the melting point of a substance, the solid, liquid, and gas phases are all in equilibrium.
B)  The freezing point and the melting point of a substance are the same.
C)  There is no fundamental difference in the melting process for covalent substances and ionic substances.
D)  When iodine vapor cools at atmospheric pressure, it condenses to the liquid state.
E)  In order for a substance to go from the liquid phase to the gas phase, it must give off energy to the surroundings.

Question 7

What phase transition is occurring between points D and E on the heating curve?

Accepted Answer

A)  melting
B)  freezing
C)  evaporation
D)  sublimation
E)  deposition

Question 8

The pictured change of state occurs at constant temperature even though heat is being removed.Where does this change of state occur on the cooling curve?

Accepted Answer

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

Question 9

Identify the type of solid shown in the image.

Accepted Answer

A)  metallic
B)  ionic
C)  network
D)  molecular
E)  amorphous

Question 10

A solid substance has a high melting point, is hard, brittle, and conducts electricity when molten.This substance is probably a(n)________ solid.

Accepted Answer

A)  metallic
B)  ionic
C)  network
D)  nonpolar molecular
E)  polar molecular

Question 11

Calculate the amount of heat energy required to convert 55.0 g of water at 62.5oC to steam at 124.0 $\degree$C.(Cwater = 4.18 J/g $\degree$C; Csteam = 2.02 J/g $\degree$C; molar heat of vaporization of liquid water = 4.07 x 104 J/mol)

Accepted Answer

A)  2.25 x 103 kJ
B)  1.23 x 102 kJ
C)  0.862 kJ
D)  1.35 x 102 kJ
E)  2.67 kJ

Question 12

Rank the following substances in order of increasing boiling point: O2, Ne, Ar, H2

Accepted Answer

A)  O2 2 
B)  O2 2 
C)  H2 2 
D)  H2 2 
E)  Ar 2 2

Question 13

Which of the following substances can participate in hydrogen bonding?

Accepted Answer

A)  CH4 
B)  HF
C)  CH3COCH3 
D)  SiH4 
E)  all of these choices are correct

Question 14

The physical properties of a substance influenced by the strength of intermolecular forces include all of the following except:

Accepted Answer

A)  density.
B)  boiling point.
C)  surface tension.
D)  melting point.
E)  mass.

Question 15

Rank the following substances in order of increasing boiling point: F2, Ne, He, Cl2

Accepted Answer

A)  F2 2 
B)  F2 2 
C)  F2 2 
D)  He 2 2 
E)  Cl2 2 < Ne < He

Question 16

Which of the following statements regarding intermolecular forces is incorrect?

Accepted Answer

A)  Hydrogen bonding is the strongest of the intermolecular forces for substances of similar molar mass.
B)  London dispersion forces are present in all atoms and molecules.
C)  Dipole-dipole forces increase with increasing molecular size.
D)  Bonding forces are much stronger than intermolecular forces.
E)  Hydrogen bonding is the reason for the abnormally high boiling point of water.

Question 17

Which choice correctly lists the intermolecular forces present in CH3NH2?

Accepted Answer

A)  London forces only
B)  dipole-dipole forces only
C)  London forces, dipole-dipole forces, and hydrogen bonding
D)  dipole-dipole forces and hydrogen bonding
E)  hydrogen bonding only

Question 18

Calculate the amount of heat energy required to melt 25.0 g of ice at 0.0 $\degree$C.(molar heat of fusion of ice = 6.01 x 103 J/mol)

Accepted Answer

A)  1.50 x 102 kJ
B)  8.34 kJ
C)  4.33 kJ
D)  7.50 x 102 kJ
E)  1.50 x 10-1 kJ

Question 19

Three phases of water are shown in the figure.List the terms used to identify the phase changes indicated by the arrows.

Accepted Answer

A)  A = sublimation, B = vaporization, C = freezing
B)  A = vaporization, B = condensation, C = melting
C)  A = vaporization, B = deposition, C = melting
D)  A = sublimation, B = condensation, C = freezing
E)  A = condensation, B = sublimation, C = freezing

Question 20

Identify the type of solid shown in the image.

Accepted Answer

A)  metallic
B)  ionic
C)  network
D)  nonpolar molecular
E)  polar molecular

Exam 10: The Liquid and Solid States

The forces that hold CO₂ together in the solid state are:

Arrange the following substances in order of increasing boiling point: N₂, H₂, NH_3,PH₃

Rank the following substances in order of increasing intermolecular forces: He, HF, F₂, Ne

A solid substance has a moderate melting point, is fairly soft, and is a nonconductor.This substance is probably a(n) ________ solid.

Which of the following molecules experience dipole-dipole forces?

Which of the following statements is correct?

What phase transition is occurring between points D and E on the heating curve?

The pictured change of state occurs at constant temperature even though heat is being removed.Where does this change of state occur on the cooling curve?

Identify the type of solid shown in the image.

A solid substance has a high melting point, is hard, brittle, and conducts electricity when molten.This substance is probably a(n) ________ solid.

Calculate the amount of heat energy required to convert 55.0 g of water at 62.5^oC to steam at 124.0 $\degree$ C.(C_water = 4.18 J/g $\degree$ C; C_steam = 2.02 J/g $\degree$ C; molar heat of vaporization of liquid water = 4.07 x 10⁴ J/mol)

Rank the following substances in order of increasing boiling point: O₂, Ne, Ar, H₂

Which of the following substances can participate in hydrogen bonding?

The physical properties of a substance influenced by the strength of intermolecular forces include all of the following except:

Rank the following substances in order of increasing boiling point: F₂, Ne, He, Cl₂

Which of the following statements regarding intermolecular forces is incorrect?

Which choice correctly lists the intermolecular forces present in CH₃NH₂?

Calculate the amount of heat energy required to melt 25.0 g of ice at 0.0 $\degree$ C.(molar heat of fusion of ice = 6.01 x 10³ J/mol)

Three phases of water are shown in the figure.List the terms used to identify the phase changes indicated by the arrows.

Identify the type of solid shown in the image.

Exam 10: The Liquid and Solid States

The forces that hold CO2 together in the solid state are:

Arrange the following substances in order of increasing boiling point: N2, H2, NH3, PH3

Rank the following substances in order of increasing intermolecular forces: He, HF, F2, Ne

A solid substance has a moderate melting point, is fairly soft, and is a nonconductor.This substance is probably a(n) ________ solid.

Which of the following molecules experience dipole-dipole forces?

Which of the following statements is correct?

What phase transition is occurring between points D and E on the heating curve?

The pictured change of state occurs at constant temperature even though heat is being removed.Where does this change of state occur on the cooling curve?

Identify the type of solid shown in the image.

A solid substance has a high melting point, is hard, brittle, and conducts electricity when molten.This substance is probably a(n) ________ solid.

Calculate the amount of heat energy required to convert 55.0 g of water at 62.5oC to steam at 124.0 °\degree° C.(Cwater = 4.18 J/g °\degree° C; Csteam = 2.02 J/g °\degree° C; molar heat of vaporization of liquid water = 4.07 x 104 J/mol)

Rank the following substances in order of increasing boiling point: O2, Ne, Ar, H2

Which of the following substances can participate in hydrogen bonding?

The physical properties of a substance influenced by the strength of intermolecular forces include all of the following except:

Rank the following substances in order of increasing boiling point: F2, Ne, He, Cl2

Which of the following statements regarding intermolecular forces is incorrect?

Which choice correctly lists the intermolecular forces present in CH3NH2?

Calculate the amount of heat energy required to melt 25.0 g of ice at 0.0 °\degree° C.(molar heat of fusion of ice = 6.01 x 103 J/mol)

Three phases of water are shown in the figure.List the terms used to identify the phase changes indicated by the arrows.

Identify the type of solid shown in the image.

The forces that hold CO₂ together in the solid state are:

Arrange the following substances in order of increasing boiling point: N₂, H₂, NH_3,PH₃

Rank the following substances in order of increasing intermolecular forces: He, HF, F₂, Ne

Calculate the amount of heat energy required to convert 55.0 g of water at 62.5^oC to steam at 124.0 $\degree$ C.(C_water = 4.18 J/g $\degree$ C; C_steam = 2.02 J/g $\degree$ C; molar heat of vaporization of liquid water = 4.07 x 10⁴ J/mol)

Rank the following substances in order of increasing boiling point: O₂, Ne, Ar, H₂

Rank the following substances in order of increasing boiling point: F₂, Ne, He, Cl₂

Which choice correctly lists the intermolecular forces present in CH₃NH₂?

Calculate the amount of heat energy required to melt 25.0 g of ice at 0.0 $\degree$ C.(molar heat of fusion of ice = 6.01 x 10³ J/mol)