Question 1

Which of the following is not an endothermic process?

Accepted Answer

A) melting of a solid 
B) vaporization 
C) raising the temperature of a gas 
D) condensation of water vapor 
E) sublimation of dry ice 
A) melting of a solid 
B) vaporization 
C) raising the temperature of a gas 
D) condensation of water vapor 
E) sublimation of dry ice

Question 2

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

Question 3

The number of nearest neighbors (atoms that make contact)around each atom in a face-centered cubic lattice of a metal is

Accepted Answer

A) 2 
B) 4 
C) 6 
D) 8 
E) 12 
A) 2 
B) 4 
C) 6 
D) 8 
E) 12

Question 4

Atoms share electrons.

Accepted Answer

A) 1 and 4 
B) 1 and 3 
C) 2 and 3 
D) 2 and 4 
E) 3 and 4 
A) 1 and 4 
B) 1 and 3 
C) 2 and 3 
D) 2 and 4 
E) 3 and 4

Question 5

The molar enthalpy of vaporization of boron tribromide is 30.5 kJ/mol, and its normal boiling point is 91°C. What is the vapor pressure of BBr3 at 20°C?

Accepted Answer

A) 11.5 torr 
B) 311 torr 
C) 5.31 torr 
D) 143 torr 
E) 66.1 torr 
A) 11.5 torr 
B) 311 torr 
C) 5.31 torr 
D) 143 torr 
E) 66.1 torr

Question 6

Which property of water allows a razor blade to float on it without sinking?

Accepted Answer

A) viscosity 
B) surface tension 
C) density 
D) specific heat 
E) triple point 
A) viscosity 
B) surface tension 
C) density 
D) specific heat 
E) triple point

Question 7

Arrange the following in order of increasing boiling point: RbCl, CH3Cl, CH3OH, CH4.

Accepted Answer

A) CH3OH 3Cl 4 
B) CH3OH 4 3Cl 3Cl 3OH 4 
D) CH4 3OH 3Cl 4 3Cl 3OH < RbCl 
A) CH3OH 3Cl 4 
B) CH3OH 4 3Cl 3Cl 3OH 4 
D) CH4 3OH 3Cl 4 3Cl 3OH < RbCl

Question 8

For which of the following species are the intermolecular interactions entirely due to dispersion forces?

Accepted Answer

A) C2H6 
B) CH3OCH3 
C) NO2 
D) H2S 
E) CaNO3 
A) C2H6 
B) CH3OCH3 
C) NO2 
D) H2S 
E) CaNO3

Question 9

Of the given pair of compounds, which would have the higher boiling point?
CCl4 or CH4

Accepted Answer

Question 10

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 11

Choose the response that lists the member of each of the following pairs that has the higher boiling point. (I)H2O or KI (II)HF or HI (III)Cl2 or Br2

Accepted Answer

A) H2O, HF, and Cl2 
B) KI, HF, and Br2 
C) KI, HI, and Br2 
D) H2O, HI, and Cl2 
E) KI, HF, and Cl2 
A) H2O, HF, and Cl2 
B) KI, HF, and Br2 
C) KI, HI, and Br2 
D) H2O, HI, and Cl2 
E) KI, HF, and Cl2

Question 12

The number of atoms in a face-centered cubic unit cell is

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 8 
A) 1 
B) 2 
C) 3 
D) 4 
E) 8

Question 13

Sodium iodide, NaI, melts at 651°C. In its liquid state NaI conducts electricity. What kind of crystal is this?

Accepted Answer

The answer of Sodium iodide, NaI, melts at 651°C. In...

Question 14

Indicate all the types of intermolecular forces of attraction in CH3OH(l).

Accepted Answer

hydrogen b

Question 15

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

Question 16

Which one of the following substances should exhibit hydrogen bonding in the liquid state?

Accepted Answer

A) PH3 
B) H2 
C) H2S 
D) CH4 
E) NH3 
A) PH3 
B) H2 
C) H2S 
D) CH4 
E) NH3

Question 17

Iron crystallizes in a body-centered cubic unit. The edge of this cell is 287 pm. Calculate the density of iron.

Accepted Answer

The answer of Iron crystallizes in a body-centered cubic unit....

Question 18

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

Accepted Answer

hydrogen b

Question 19

Which one of the following substances will have both dispersion forces and dipole-dipole forces?

Accepted Answer

A) HCl 
B) BCl3 
C) Br2 
D) H2 
E) CO2 
A) HCl 
B) BCl3 
C) Br2 
D) H2 
E) CO2

Question 20

What mass of water would need to evaporate from your skin in order to dissipate 1.7 * 105 J of heat from your body? H2O(l)$\rarr$H2O(g)$\Delta$Hvap = 40.7 kJ/mol

Accepted Answer

A) 7.52 * 104 g 
B) 418 g 
C) 75.2 g 
D) 58.4 g 
E) 6.92 * 106 g 
A) 7.52 * 104 g 
B) 418 g 
C) 75.2 g 
D) 58.4 g 
E) 6.92 * 106 g

Exam 11: Intermolecular Forces and Liquids and Solids

Which of the following is not an endothermic process?

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?

The number of nearest neighbors (atoms that make contact)around each atom in a face-centered cubic lattice of a metal is

Atoms share electrons.

The molar enthalpy of vaporization of boron tribromide is 30.5 kJ/mol, and its normal boiling point is 91°C. What is the vapor pressure of BBr3 at 20°C?

Which property of water allows a razor blade to float on it without sinking?

Arrange the following in order of increasing boiling point: RbCl, CH3Cl, CH3OH, CH4.

For which of the following species are the intermolecular interactions entirely due to dispersion forces?

Of the given pair of compounds, which would have the higher boiling point? CCl4 or CH4

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

Choose the response that lists the member of each of the following pairs that has the higher boiling point. (I)H2O or KI (II)HF or HI (III)Cl2 or Br2

The number of atoms in a face-centered cubic unit cell is

Sodium iodide, NaI, melts at 651°C. In its liquid state NaI conducts electricity. What kind of crystal is this?

Indicate all the types of intermolecular forces of attraction in CH3OH(l).

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?

Which one of the following substances should exhibit hydrogen bonding in the liquid state?

Iron crystallizes in a body-centered cubic unit. The edge of this cell is 287 pm. Calculate the density of iron.

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

Which one of the following substances will have both dispersion forces and dipole-dipole forces?

What mass of water would need to evaporate from your skin in order to dissipate 1.7 * 105 J of heat from your body? H2O(l) →\rarr→ H2O(g) Δ\DeltaΔ Hvap = 40.7 kJ/mol

Chemistry: The Study of Change

Atoms, Molecules, and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solution

Gases

Thermo-Chemistry

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

Chemistry in the Atmosphere

Entropy, Free Energy, and Equilibrium

Electrochemistry

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Transition Metal Chemistry and Coordination Compounds

Nuclear Chemistry

Organic Chemistry

Synthetic and Natural Organic Polymers

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The molar enthalpy of vaporization of boron tribromide is 30.5 kJ/mol, and its normal boiling point is 91°C. What is the vapor pressure of BBr₃ at 20°C?

Arrange the following in order of increasing boiling point: RbCl, CH₃Cl, CH₃OH, CH₄.

Of the given pair of compounds, which would have the higher boiling point? CCl₄ or CH₄

Choose the response that lists the member of each of the following pairs that has the higher boiling point. (I)H₂O or KI (II)HF or HI (III)Cl₂ or Br₂

Indicate all the types of intermolecular forces of attraction in CH₃OH(l).

What mass of water would need to evaporate from your skin in order to dissipate 1.7 * 10⁵ J of heat from your body? H₂O(l) $\rarr$ H₂O(g) $\Delta$ H_vap = 40.7 kJ/mol