Question 1

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

Accepted Answer

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

Question 2

Match the following.

-LiI

Accepted Answer

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

Question 3

Which of the following is considered a nonbonding atomic solid?

Accepted Answer

A) Ne 
B) Fe 
C) I2 
D) Ca 
E) Li 
A) Ne 
B) Fe 
C) I2 
D) Ca 
E) Li A

Question 4

Place the following compounds in order of increasing strength of intermolecular forces. CH4 CH3CH2CH3 CH3CH3

Accepted Answer

A) CH3CH2CH3 4 3CH3 
B) CH3CH2CH3 3CH3 4 
C) CH3CH3 4 3CH2CH3 
D) CH4 3CH2CH3 3CH3 
E) CH4 3CH3 3CH2CH3 
A) CH3CH2CH3 4 3CH3 
B) CH3CH2CH3 3CH3 4 
C) CH3CH3 4 3CH2CH3 
D) CH4 3CH2CH3 3CH3 
E) CH4 3CH3 3CH2CH3

Question 5

Which substance below has the strongest intermolecular forces?

Accepted Answer

A) A2X, ΔvapH = 39.6 kJ mol-1 
B) BY2, ΔvapH = 26.7 kJ mol-1 
C) C3X2, ΔvapH = 36.4 kJ mol-1 
D) DX2, ΔvapH = 23.3 kJ mol-1 
E) EY3, ΔvapH = 21.5 kJ mol-1 
A) A2X, ΔvapH = 39.6 kJ mol-1 
B) BY2, ΔvapH = 26.7 kJ mol-1 
C) C3X2, ΔvapH = 36.4 kJ mol-1 
D) DX2, ΔvapH = 23.3 kJ mol-1 
E) EY3, ΔvapH = 21.5 kJ mol-1

Question 6

Why is water an extraordinary substance?

Accepted Answer

A) Water has a low molar mass, yet it is a liquid at room temperature. 
B) Water is the main solvent within living organisms. 
C) Water has an exceptionally high specific heat capacity. 
D) Water has strong hydrogen bonding. 
E) All of the above. 
A) Water has a low molar mass, yet it is a liquid at room temperature. 
B) Water is the main solvent within living organisms. 
C) Water has an exceptionally high specific heat capacity. 
D) Water has strong hydrogen bonding. 
E) All of the above.

Question 7

Match the following.

-CH3OH

Accepted Answer

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

Question 8

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 9

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 10

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

Accepted Answer

A) SbCl3 
B) AsCl5 
C) ICl2 
D) BeCl2 
E) OCl2 
A) SbCl3 
B) AsCl5 
C) ICl2 
D) BeCl2 
E) OCl2

Question 11

How much heat is released when 105 g of steam at 100.0 °C is cooled to ice at -15.0 °C? The enthalpy of vaporization of water is 40.67 kJ mol-1, the enthalpy of fusion for water is 6.01 kJ mol-1, the molar heat capacity of liquid water is 75.4 J mol-1 °C-1, and the molar heat capacity of ice is 36.4 J mol-1 °C-1.

Accepted Answer

A) 54.8 kJ 
B) 273 kJ 
C) 319 kJ 
D) 347 kJ 
A) 54.8 kJ 
B) 273 kJ 
C) 319 kJ 
D) 347 kJ

Question 12

Which has the smallest dipole-dipole forces?

Accepted Answer

A) CH3Cl  
B) HBr  
C) O2 
D) NO  
A) CH3Cl  
B) HBr  
C) O2 
D) NO

Question 13

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

Accepted Answer

A) CCl4 and SCl2 
B) NF3 and SO2 
C) CO and C6H6 
D) NH2CH3 and CH4 
E) None of the pairs above will form a homogeneous solution. 
A) CCl4 and SCl2 
B) NF3 and SO2 
C) CO and C6H6 
D) NH2CH3 and CH4 
E) None of the pairs above will form a homogeneous solution.

Question 14

Place the following substances in order of decreasing vapour pressure at a given temperature. BeF2 CH3OH OF2

Accepted Answer

A) CH3OH > OF2 > BeF2 
B) BeF2 > OF2 > CH3OH 
C) OF2 > CH3OH > BeF2 
D) OF2 > BeF2 > CH3OH 
E) BeF2 > CH3OH > OF2 
A) CH3OH > OF2 > BeF2 
B) BeF2 > OF2 > CH3OH 
C) OF2 > CH3OH > BeF2 
D) OF2 > BeF2 > CH3OH 
E) BeF2 > CH3OH > OF2

Question 15

Identify the type of solid for gold.

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 16

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 17

Determine ΔvapH for a compound that has a measured vapour pressure of 32.40 mbar at 273 K and 180.0 mbar at 325 K.

Accepted Answer

A) 41 kJ mol-1 
B) 79 kJ mol-1 
C) 24 kJ mol-1 
D) 13 kJ mol-1 
E) 34 kJ mol-1 
A) 41 kJ mol-1 
B) 79 kJ mol-1 
C) 24 kJ mol-1 
D) 13 kJ mol-1 
E) 34 kJ mol-1

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 is 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 is false.

Question 19

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 20

Choose the substance with the lowest vapour pressure at a given temperature.

Accepted Answer

A) CO2 
B) BeCl2 
C) BF3 
D) He 
E) PF5 
A) CO2 
B) BeCl2 
C) BF3 
D) He 
E) PF5

Exam 11: Liquids, Solids, and Intermolecular Forces

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

Match the following. -LiI

Which of the following is considered a nonbonding atomic solid?

Place the following compounds in order of increasing strength of intermolecular forces. CH4 CH3CH2CH3 CH3CH3

Which substance below has the strongest intermolecular forces?

Why is water an extraordinary substance?

Match the following. -CH3OH

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

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

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

Which has the smallest dipole-dipole forces?

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

Place the following substances in order of decreasing vapour pressure at a given temperature. BeF2 CH3OH OF2

Identify the type of solid for gold.

Determine ΔvapH for a compound that has a measured vapour pressure of 32.40 mbar at 273 K and 180.0 mbar at 325 K.

Which of the following statements is FALSE?

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

Choose the substance with the lowest vapour pressure at a given temperature.

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 Metallury

Transition Metals and Coordination Compounds

Filters

Place the following compounds in order of increasing strength of intermolecular forces. CH₄ CH₃CH₂CH₃ CH₃CH₃

Match the following. -CH₃OH

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

Place the following substances in order of decreasing vapour pressure at a given temperature. BeF₂ CH₃OH OF₂

Determine Δ_vapH for a compound that has a measured vapour pressure of 32.40 mbar at 273 K and 180.0 mbar at 325 K.