Question 1

Which pairs of substances would form homogeneous solutions when combined?

Accepted Answer

A)  Methanol and water 
B)  Diethyl ether and water 
C)  CH2Cl2 and water 
D)  CCl4 and water 
A)  Methanol and water 
B)  Diethyl ether and water 
C)  CH2Cl2 and water 
D)  CCl4 and water

Question 2

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 3

Determine the vapour pressure (in mbar) of a substance at 29 °C, whose normal boiling point is 76 °C and has a ΔvapH of 38.7 kJ mol-1.

Accepted Answer

A)  80 mbar 
B)  13 mbar 
C)  21 mbar 
D)  48 mbar 
E)  128 mbar 
A)  80 mbar 
B)  13 mbar 
C)  21 mbar 
D)  48 mbar 
E)  128 mbar

Question 4

Which pairs of substances would form homogeneous solutions when combined?

Accepted Answer

A)  Hexane and water 
B)  Oil and water 
C)  KCl and water 
D)  CCl4 and water 
A)  Hexane and water 
B)  Oil and water 
C)  KCl and water 
D)  CCl4 and water

Question 5

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 6

Identify the type of solid for diamond.

Accepted Answer

A)  metallic atomic solid 
B)  ionic solid 
C)  nonbonding atomic solid 
D)  molecular solid 
E)  networking atomic solid 
A)  metallic atomic solid 
B)  ionic solid 
C)  nonbonding atomic solid 
D)  molecular solid 
E)  networking atomic solid

Question 7

Place the following substances in order of decreasing vapour pressure at a given temperature. PF5 BrF3 CF4

Accepted Answer

A)  BrF3 > PF5 > CF4 
B)  BrF3 > CF4 > PF5 
C)  PF5 > BrF3 > CF4 
D)  CF4 > BrF3 > PF5 
E)  CF4 > PF5 > BrF3 
A)  BrF3 > PF5 > CF4 
B)  BrF3 > CF4 > PF5 
C)  PF5 > BrF3 > CF4 
D)  CF4 > BrF3 > PF5 
E)  CF4 > PF5 > BrF3

Question 8

Define the boiling point of a liquid.

Accepted Answer

The temperature at w

Question 9

Define boiling.

Accepted Answer

A)  A liquid becomes a gas. 
B)  A gas becomes a liquid. 
C)  A gas becomes a solid. 
D)  A solid becomes a gas. 
E)  A solid becomes a liquid. 
A)  A liquid becomes a gas. 
B)  A gas becomes a liquid. 
C)  A gas becomes a solid. 
D)  A solid becomes a gas. 
E)  A solid becomes a liquid.

Question 10

A metal crystallizes in a face-centred cubic structure and has a density of 11.9 g cm-3. If the radius of the metal atom is 138 pm, what is the identity of the metal?

Accepted Answer

A)  At 
B)  Pd 
C)  Mn 
D)  Fe 
E)  Cr 
A)  At 
B)  Pd 
C)  Mn 
D)  Fe 
E)  Cr

Question 11

Give the change in condition to go from a liquid to a gas.

Accepted Answer

A)  increase heat or reduce pressure 
B)  increase heat or increase pressure 
C)  cool or reduce pressure 
D)  cool or increase pressure 
E)  none of the above 
A)  increase heat or reduce pressure 
B)  increase heat or increase pressure 
C)  cool or reduce pressure 
D)  cool or increase pressure 
E)  none of the above

Question 12

How much energy must be removed from a 94.4 g sample of benzene (molar mass = 78.11 g mol-1) at 322.0 K to solidify the sample and lower the temperature to 205.0 K? The following physical data may be useful: ΔvapH = 33.9 kJ mol-1
ΔfusH = 9.8 kJ mol-1
Cliq = 1.73 J g-1 °C-1
Cgas = 1.06 J g-1 °C-1
Csol = 1.51 J g-1 °C-1
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 13

Which of the following substances should have the highest melting point?

Accepted Answer

A)  Fe 
B)  Ne 
C)  Xe 
D)  N2 
E)  CO 
A)  Fe 
B)  Ne 
C)  Xe 
D)  N2 
E)  CO

Question 14

Determine the normal boiling point of a substance whose vapour pressure is 73.46 mbar at 35 °C and has a ΔvapH of 32.1 kJ mol-1.

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 15

Give the edge length in terms of r for a simple cubic cell.

Accepted Answer

The answer of Give the edge length in terms of...

Question 16

Choose the substance with the highest viscosity in the liquid phase.

Accepted Answer

A)  (CH3CH2)2CO 
B)  C2H4Cl2 
C)  HOCH2CH2CH2CH2OH 
D)  CF4 
E)  C6H14 
A)  (CH3CH2)2CO 
B)  C2H4Cl2 
C)  HOCH2CH2CH2CH2OH 
D)  CF4 
E)  C6H14

Question 17

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

Accepted Answer

A)  CH3Cl 
B)  HCl 
C)  HOCH2CH2OH 
D)  CH3CH2OH 
E)  CH3CH2CH2CH3 
A)  CH3Cl 
B)  HCl 
C)  HOCH2CH2OH 
D)  CH3CH2OH 
E)  CH3CH2CH2CH3

Question 18

How much energy must be removed from a 125 g sample of benzene (molar mass = 78.11 g mol-1) at 425.0 K to liquify the sample and lower the temperature to 335.0 K? The following physical data may be useful: ΔvapH = 33.9 kJ mol-1
ΔfusH = 9.8 kJ mol-1
Cliq = 1.73 J g-1 °C-1
Cgas = 1.06 J g-1 °C-1
Csol = 1.51 J g-1 °C-1
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 19

Which of the following compounds exhibits only dispersion and dipole-dipole intermolecular interactions?

Accepted Answer

A)  H2 
B)  HI  
C)  CO2 
D)  CH3NH2 
A)  H2 
B)  HI  
C)  CO2 
D)  CH3NH2

Question 20

Match the following.
-CH2F2

Accepted Answer

A) dipole-dipole forces 
B) ion-dipole forces 
C) H2 + H2O 
D) dispersion forces 
E) hydrogen bonding
F)ionic bond 
A) dipole-dipole forces 
B) ion-dipole forces 
C) H2 + H2O 
D) dispersion forces 
E) hydrogen bonding
F)ionic bond

Exam 11: Liquids, Solids, and Intermolecular Forces

Which pairs of substances would form homogeneous solutions when combined?

Identify the compound with the highest boiling point.

Determine the vapour pressure (in mbar) of a substance at 29 °C, whose normal boiling point is 76 °C and has a ΔvapH of 38.7 kJ mol-1.

Which pairs of substances would form homogeneous solutions when combined?

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

Identify the type of solid for diamond.

Place the following substances in order of decreasing vapour pressure at a given temperature. PF5 BrF3 CF4

Define the boiling point of a liquid.

Define boiling.

A metal crystallizes in a face-centred cubic structure and has a density of 11.9 g cm-3. If the radius of the metal atom is 138 pm, what is the identity of the metal?

Give the change in condition to go from a liquid to a gas.

Which of the following substances should have the highest melting point?

Determine the normal boiling point of a substance whose vapour pressure is 73.46 mbar at 35 °C and has a ΔvapH of 32.1 kJ mol-1.

Give the edge length in terms of r for a simple cubic cell.

Choose the substance with the highest viscosity in the liquid phase.

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

Which of the following compounds exhibits only dispersion and dipole-dipole intermolecular interactions?

Match the following. -CH2F2

Units of Measurement for Physical and Chemical Change

Atoms and Elements

Molecules, Compounds, and Nomenclature

Chemical Reactions and Stoichiometry

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 Molecular Orbital Theory

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Gibbs Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry I: Structures

Organic Chemistry Ii: Reactions

Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

Filters

Determine the vapour pressure (in mbar) of a substance at 29 °C, whose normal boiling point is 76 °C and has a Δ_vapHof 38.7 kJ mol^-1.

Place the following substances in order of decreasing vapour pressure at a given temperature. PF₅ BrF₃ CF₄

A metal crystallizes in a face-centred cubic structure and has a density of 11.9 g cm^-3. If the radius of the metal atom is 138 pm, what is the identity of the metal?

Determine the normal boiling point of a substance whose vapour pressure is 73.46 mbar at 35 °C and has a Δ_vapH of 32.1 kJ mol^-1.

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

Match the following. -CH₂F₂