Question 1

What is the strongest type of intermolecular force present in CHF3?

Accepted Answer

A) ion-dipole 
B) dispersion 
C) hydrogen bonding 
D) dipole-dipole 
E) none of the above 
A) ion-dipole 
B) dispersion 
C) hydrogen bonding 
D) dipole-dipole 
E) none of the above

Question 2

What is the strongest type of intermolecular force present in NH2CH3?

Accepted Answer

A) dispersion 
B) dipole-dipole 
C) hydrogen bonding 
D) ion-dipole 
E) none of the above 
A) dispersion 
B) dipole-dipole 
C) hydrogen bonding 
D) ion-dipole 
E) none of the above

Question 3

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

Accepted Answer

A) gasoline 
B) water 
C) corn syrup 
D) motor oil 
E) tea 
A) gasoline 
B) water 
C) corn syrup 
D) motor oil 
E) tea

Question 4

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 5

Place the following substances in order of decreasing boiling point. 
N2 $\quad$O2 $\quad$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 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

Which is expected to have the largest dispersion forces?

Accepted Answer

A) C2H4 
B) C8H16 
C) Cl2 
D) N2H4 
A) C2H4 
B) C8H16 
C) Cl2 
D) N2H4

Question 8

-Based on the figure above,the boiling point of diethyl ether under an external pressure of 1.32 $\text { bar }$ is ________ °C.

Accepted Answer

A) 10 
B) 20 
C) 30 
D) 40 
E) 0 
A) 10 
B) 20 
C) 30 
D) 40 
E) 0

Question 9

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 10

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 11

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

Question 12

What is the edge length of a face-centred 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 13

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 14

Lithium crystallizes in a body-centred cubic structure.What is the coordination number of each atom?

Accepted Answer

A) 4 
B) 6 
C) 8 
D) 12 
A) 4 
B) 6 
C) 8 
D) 12

Question 15

How much energy is required to vaporize 98.6 g of ethanol (C2H5OH)at its boiling point if its ΔvapH is 40.5 kJ mol-1?

Accepted Answer

A) 86.7 kJ 
B) 11.5 kJ 
C) 18.9 kJ 
D) 52.8 kJ 
E) 39.9 kJ 
A) 86.7 kJ 
B) 11.5 kJ 
C) 18.9 kJ 
D) 52.8 kJ 
E) 39.9 kJ

Question 16

Which of the following statements is TRUE?

Accepted Answer

A) Intermolecular forces are generally stronger than bonding forces. 
B) The potential energy of molecules decrease as they get closer to one another. 
C) Energy is given off when the attraction between two molecules is broken. 
D) Increasing the pressure on a solid usually causes it to become a liquid. 
E) None of the above is true. 
A) Intermolecular forces are generally stronger than bonding forces. 
B) The potential energy of molecules decrease as they get closer to one another. 
C) Energy is given off when the attraction between two molecules is broken. 
D) Increasing the pressure on a solid usually causes it to become a liquid. 
E) None of the above is true.

Question 17

Place the following compounds in order of decreasing strength of intermolecular forces. 
HF $\quad$O2 $\quad$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

Question 18

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 19

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 20

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

Exam 11: Liquids, solids, and Intermolecular Forces

What is the strongest type of intermolecular force present in CHF3?

What is the strongest type of intermolecular force present in NH2CH3?

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

Which substance below has the strongest intermolecular forces?

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

Identify the type of solid for diamond.

Which is expected to have the largest dispersion forces?

-Based on the figure above,the boiling point of diethyl ether under an external pressure of 1.32 bar \text { bar } bar is ________ °C.

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.

Identify the type of solid for gold.

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

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

Define boiling.

Lithium crystallizes in a body-centred cubic structure.What is the coordination number of each atom?

How much energy is required to vaporize 98.6 g of ethanol (C2H5OH)at its boiling point if its ΔvapH is 40.5 kJ mol-1?

Which of the following statements is TRUE?

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

Which of the following is considered an ionic solid?

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

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

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

What is the strongest type of intermolecular force present in CHF₃?

What is the strongest type of intermolecular force present in NH₂CH₃?

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

$-Based on the figure above,the boiling point of diethyl ether under an external pressure of 1.32 \text { bar } is °C.$ -Based on the figure above,the boiling point of diethyl ether under an external pressure of 1.32 $\text { bar }$ is °C.

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.

How much energy is required to vaporize 98.6 g of ethanol (C₂H₅OH)at its boiling point if its Δ_vapH is 40.5 kJ mol^-1?

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

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