Question 1

Arrange the following substances in order of increasing boiling point: CH3OH, He, CH3Cl, and N2

Accepted Answer

A) CH3OH 3Cl 2 
B) He 2 3OH 3Cl 
C) N2 3OH 3Cl 
D) He 2 3Cl 3OH 
E) CH3Cl 2 3OH 
A) CH3OH 3Cl 2 
B) He 2 3OH 3Cl 
C) N2 3OH 3Cl 
D) He 2 3Cl 3OH 
E) CH3Cl 2 3OH D

Question 2

Which one of the following is an example of a covalent network solid?

Accepted Answer

A) SiO2 
B) K 
C) I2 
D) CaCl2 
E) None of these. 
A) SiO2 
B) K 
C) I2 
D) CaCl2 
E) None of these. A

Question 3

Each of the following substances is a gas at 25°C and 1 atmosphere pressure.Which one will liquefy most easily when compressed at a constant temperature?

Accepted Answer

A) F2 
B) H2 
C) HF 
D) SiH4 
E) Ar 
A) F2 
B) H2 
C) HF 
D) SiH4 
E) Ar C

Question 4

The normal boiling point of bromine is 58.8°C.Given that the vapor pressure of bromine is 75.0 torr at 2.5°C, calculate the molar enthalpy of vaporization of bromine.

Accepted Answer

A) 2.90 kJ/mol 
B) 3.57 kJ/mol 
C) 3.76 kJ/mol 
D) 29.7 kJ/mol 
E) 31.3 kJ/mol 
A) 2.90 kJ/mol 
B) 3.57 kJ/mol 
C) 3.76 kJ/mol 
D) 29.7 kJ/mol 
E) 31.3 kJ/mol

Question 5

Which one of the following substances is expected to have the highest boiling point?

Accepted Answer

A) Br2 
B) Cl2 
C) F2 
D) I2 
A) Br2 
B) Cl2 
C) F2 
D) I2

Question 6

All intermolecular forces must be overcome in order for a substance to undergo a phase change from a solid to a liquid

Accepted Answer

A) True 
 B)False

Question 7

Vanadium crystallizes in a body-centered cubic lattice, and the length of the edge of a unit cell is 305 pm.What is the density of V?

Accepted Answer

A) 5.96 × 10-30 g/cm3 
B) 2.98 × 10-6 g/cm3 
C) 2.98 g/cm3 
D) 5.96 g/cm3 
E) 11.9 g/cm3 
A) 5.96 × 10-30 g/cm3 
B) 2.98 × 10-6 g/cm3 
C) 2.98 g/cm3 
D) 5.96 g/cm3 
E) 11.9 g/cm3

Question 8

Which liquid is expected to have the larger surface tension at a given temperature, CCl4 or H2O? Briefly explain.

Accepted Answer

Water would have the

Question 9

Indicate all the types of intermolecular forces of attraction in F2(l).

Accepted Answer

Question 10

The heat capacity of liquid water is 4.18 J/g·°C and the heat of vaporization is 40.7 kJ/mol.How many kilojoules of heat must be provided to convert 1.00 g of liquid water at 67°C into 1.00 g of steam at 100°C?

Accepted Answer

A) 40.8 J 
B) 2.2 kJ 
C) 2,400 J 
D) 22.7 kJ 
E) 40.8 kJ 
A) 40.8 J 
B) 2.2 kJ 
C) 2,400 J 
D) 22.7 kJ 
E) 40.8 kJ

Question 11

SrF2 crystallizes such that the Sr2+ ions are in a face-centered cubic arrangement and the F- ions are in the holes of the lattice (fluorite structure).How many F- ions are present in one unit cell of this crystal?

Accepted Answer

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

Question 12

Given that the heat of vaporization of diethyl ether is 26.0 kJ/mol and the vapor pressure of diethyl ether is 440 torr at 20.°C, calculate the normal boiling point of diethyl ether.

Accepted Answer

36°C (the

Question 13

Copper crystallizes in a face-centered cubic unit cell.The density of copper is 8.94 g/cm3.Calculate the length of the edge of the unit cell in pm.

Accepted Answer

Question 14

The atomic planes in a graphite crystal are separated by 335 pm.At what angle would you find the first-order (n = 1)diffraction of 0.154 nm X-rays from a graphite crystal?

Accepted Answer

A) 0.232° 
B) 2.63° 
C) 13.3° 
D) 27.4° 
E) 66.8° 
A) 0.232° 
B) 2.63° 
C) 13.3° 
D) 27.4° 
E) 66.8°

Question 15

Which would be expected to have the larger molar heat of vaporization ($\Delta$Hvap), H2Se or H2O?

Accepted Answer

Question 16

What phase exists at the point labeled b?

Accepted Answer

The answer of What phase exists at the point labeled...

Question 17

Arrange the following in order of increasing melting point: NaCl, H2O, CH4, C6H4(OH)2

Accepted Answer

A) NaCl 2O 4 6H4(OH)2 
B) CH4 2O 6H4(OH)2 
C) CH4 2O 6H4(OH)2 4 6H4(OH)2 2O 4 6H4(OH)2 2O 
A) NaCl 2O 4 6H4(OH)2 
B) CH4 2O 6H4(OH)2 
C) CH4 2O 6H4(OH)2 4 6H4(OH)2 2O 4 6H4(OH)2 2O

Question 18

Which one of the following substances is expected to have the lowest melting point?

Accepted Answer

A) BrI 
B) CsI 
C) LiI 
D) NaI 
E) RbI 
A) BrI 
B) CsI 
C) LiI 
D) NaI 
E) RbI

Question 19

The vapor pressure of a liquid in a closed container depends upon

Accepted Answer

A) the amount of liquid. 
B) the surface area of the liquid. 
C) the volume of the container. 
D) the temperature. 
E) None of the above. 
A) the amount of liquid. 
B) the surface area of the liquid. 
C) the volume of the container. 
D) the temperature. 
E) None of the above.

Question 20

The most space efficient arrangement of spheres is found in which type of unit cell?

Accepted Answer

A) face-centered cubic 
B) body-centered cubic 
C) simple cubic 
D) face-centered cubic and body-centered cubic 
E) body-centered cubic and simple cubic 
A) face-centered cubic 
B) body-centered cubic 
C) simple cubic 
D) face-centered cubic and body-centered cubic 
E) body-centered cubic and simple cubic

Exam 11: Intermolecular Forces and Liquids and Solids

Arrange the following substances in order of increasing boiling point: CH3OH, He, CH3Cl, and N2

Which one of the following is an example of a covalent network solid?

Each of the following substances is a gas at 25°C and 1 atmosphere pressure.Which one will liquefy most easily when compressed at a constant temperature?

The normal boiling point of bromine is 58.8°C.Given that the vapor pressure of bromine is 75.0 torr at 2.5°C, calculate the molar enthalpy of vaporization of bromine.

Which one of the following substances is expected to have the highest boiling point?

All intermolecular forces must be overcome in order for a substance to undergo a phase change from a solid to a liquid

Vanadium crystallizes in a body-centered cubic lattice, and the length of the edge of a unit cell is 305 pm.What is the density of V?

Which liquid is expected to have the larger surface tension at a given temperature, CCl4 or H2O? Briefly explain.

Indicate all the types of intermolecular forces of attraction in F2(l).

The heat capacity of liquid water is 4.18 J/g·°C and the heat of vaporization is 40.7 kJ/mol.How many kilojoules of heat must be provided to convert 1.00 g of liquid water at 67°C into 1.00 g of steam at 100°C?

SrF2 crystallizes such that the Sr2+ ions are in a face-centered cubic arrangement and the F- ions are in the holes of the lattice (fluorite structure).How many F- ions are present in one unit cell of this crystal?

Given that the heat of vaporization of diethyl ether is 26.0 kJ/mol and the vapor pressure of diethyl ether is 440 torr at 20.°C, calculate the normal boiling point of diethyl ether.

Copper crystallizes in a face-centered cubic unit cell.The density of copper is 8.94 g/cm3.Calculate the length of the edge of the unit cell in pm.

The atomic planes in a graphite crystal are separated by 335 pm.At what angle would you find the first-order (n = 1)diffraction of 0.154 nm X-rays from a graphite crystal?

Which would be expected to have the larger molar heat of vaporization ( Δ\DeltaΔ Hvap), H2Se or H2O?

What phase exists at the point labeled b?

Arrange the following in order of increasing melting point: NaCl, H2O, CH4, C6H4(OH)2

Which one of the following substances is expected to have the lowest melting point?

The vapor pressure of a liquid in a closed container depends upon

The most space efficient arrangement of spheres is found in which type of unit cell?

Chemistry: the Study of Change

Atoms, Molecules, and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Gases

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Periodic Relationships Among the Elements

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Molecular Geometry and Hybridization of Atomic Orbitals

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Entropy Free Energy and Equilibrium

Electrochemistry

Nuclear Chemistry

Chemistry in the Atmosphere

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Transition Metal Chemistry and Coordination Compounds

Organic Chemistry

Synthetic and Natural Organic Polymers

Filters

Arrange the following substances in order of increasing boiling point: CH₃OH, He, CH₃Cl, and N₂

Which liquid is expected to have the larger surface tension at a given temperature, CCl₄ or H₂O? Briefly explain.

Indicate all the types of intermolecular forces of attraction in F₂(l).

SrF₂ crystallizes such that the Sr²⁺ ions are in a face-centered cubic arrangement and the F^- ions are in the holes of the lattice (fluorite structure).How many F^- ions are present in one unit cell of this crystal?

Copper crystallizes in a face-centered cubic unit cell.The density of copper is 8.94 g/cm³.Calculate the length of the edge of the unit cell in pm.

Which would be expected to have the larger molar heat of vaporization ( $\Delta$ H_vap), H₂Se or H₂O?

Arrange the following in order of increasing melting point: NaCl, H₂O, CH₄, C₆H₄(OH)₂