Question 1

The triple point of iodine is at 0.12 atm and 115°C.Thus,liquid I2

Accepted Answer

A)  is more dense than I2(s) .
B)  cannot exist above 115°C.
C)  is liquid at room temperature.
D)  cannot have a vapor pressure less than 91 torr.
E)  sublimes at high pressure.F) A) and D)
G) A) and C)

Question 2

Which of the following is defined as the attractive forces between polar molecules? I.dispersion forces
II) dipole-dipole interactions
III) ion-dipole interactions

Accepted Answer

A)  I and III
B)  II only
C)  III only
D)  I,II,and III
E)  I onlyF) B) and E)
G) A) and E) B

Question 3

Which corresponds to the temperature-dependent partial pressure above the surface of a liquid?

Accepted Answer

A)  Surface tension
B)  Vapor pressure
C)  Boiling point
D)  Viscosity
E)  Capillary actionF) A) and B)
G) None of the above

Question 4

Which substance will exhibit hydrogen bonding between molecules?

Accepted Answer

A)  (CH3) 3N
B)  CH3-O-CH3
C)  CH3CH2-OH
D)  CH3CH2-F
E)  HIF) All of the above
G) C) and E)

Question 5

a.Name the two unit cells which occur in close packing of identical atoms.
b.Briefly explain how the two types of close-packed lattices of identical atoms differ,in terms of atomic arrangements.

Accepted Answer

a.face-centered cubic; hexagonal b.Cubic...

Question 6

The location that indicates conditions under which two phases can exist in equilibrium is called the

Accepted Answer

A)  triple point.
B)  critical point.
C)  phase boundary.
D)  phase diagram.
E)  transition state.F) A) and C)
G) A) and B)

Question 7

Palladium crystallizes in a face-centered cubic unit cell.Its density is 12.0 g/cm3 at 27°C.What is the atomic radius of Pd?

Accepted Answer

A)  138 pm
B)  1.95 × 10-8 nm
C)  1.95 × 10-8 cm
D)  154 pm
E)  0.109 nmF) C) and D)
G) C) and E)

Question 8

Crystals of elemental sulfur are easily crushed,and melt at 113°C.Liquid sulfur does not conduct electricity.What kind of crystal is this?

Accepted Answer

The answer of Crystals of elemental sulfur are easily crushed,and...

Question 9

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

Accepted Answer

A)  CH3OH 3Cl 4
B)  CH3OH 4 3Cl 
C)  RbCl 3 Cl 3 OH 4
D)  CH4 3OH 3Cl 
E)  CH4 3Cl 3OH < RbClF) B) and D)
G) A) and E)

Question 10

Ammonia's unusually high melting point is the result of

Accepted Answer

A)  dipole-dipole forces.
B)  London dispersion forces.
C)  hydrogen bonding.
D)  covalent bonding.
E)  ionic bonding.F) A) and D)
G) None of the above

Question 11

________________ _________ are the attractions that hold particles together in condensed phases.

Accepted Answer

Intermolec...

Question 12

The molar enthalpy of vaporization of hexane (C6H14) is 28.9 kJ/mol,and its normal boiling point is 68.73°C.What is the vapor pressure of hexane at 25°C? (R = 8.314 J/K • mol)

Accepted Answer

A)  171 torr
B)  4.44 torr
C)  117 torr
D)  3370 torr
E)  759 torrF) B) and C)
G) A) and E)

Question 13

What name is given to a quantitative measure of the elastic force in the surface of a liquid?

Accepted Answer

A)  Surface tension
B)  Adhesion
C)  Polarity
D)  Capillary action
E)  CohesionF) A) and E)
G) A) and B)

Question 14

What name is given to the phenomenon where a thin film of water contracts and adheres to the wall of a glass cylinder?

Accepted Answer

A)  Surface tension
B)  Adhesion
C)  Polarity
D)  Capillary action
E)  CohesionF) C) and D)
G) A) and D) D

Question 15

The energy of a hydrogen bond is greater than that of a typical covalent bond.

Accepted Answer

A) True 
 B)False

Question 16

Which statement concerning the vapor pressures of water and methanol (CH3OH) is true?

Accepted Answer

A)  At 25ºC,methanol has a higher vapor pressure than water because methanol has a lower normal boiling point than water.
B)  At 25ºC,methanol has a higher vapor pressure than water because methanol is a poorer solvent than water.
C)  At 25ºC,methanol has a higher vapor pressure than water because methanol is a less viscous liquid than water.
D)  At 25ºC,methanol has a higher vapor pressure than water because the density of methanol is less than the density of water.
E)  At 25ºC,methanol has a higher vapor pressure than water because methanol has weaker intermolecular forces than water.F) A) and D)
G) A) and E) E

Question 17

What is the name given to the attractive forces that hold particles together in the condensed phase?

Accepted Answer

A)  ionic bonds
B)  covalent bonds
C)  intermolecular forces
D)  electronegativity
E)  electron attractionF) A) and B)
G) C) and D)

Question 18

The zincblende structure of ZnS has the relatively large sulfide ions arranged at the lattice points of a face-centered cubic structure.The edge length of this cubic unit cell is 540.9 pm.Determine the density of zincblende.

Accepted Answer

A)  0.244 g/cm3
B)  1.02 g/cm3
C)  2.05 g/cm3
D)  4.09 g/cm3
E)  8.18 g/cm3F) A) and B)
G) A) and C)

Question 19

Which are considered van der Waals forces? I.dispersion forces
II) dipole-dipole interactions
III) hydrogen bonding

Accepted Answer

A)  I and III
B)  II only
C)  III only
D)  I,II,and III
E)  I onlyF) B) and E)
G) B) and D)

Question 20

Lead crystallizes in the face-centered cubic lattice.What is the coordination number for Pb?

Accepted Answer

A)  4
B)  6
C)  8
D)  10
E)  12F) B) and C)
G) C) and D)

Exam 11: Intermolecular Forces and the Physical Properties of Liquids and Solids

The triple point of iodine is at 0.12 atm and 115°C.Thus,liquid I2

Correct AnswerverifiedShow Answer

Which of the following is defined as the attractive forces between polar molecules? I.dispersion forces II) dipole-dipole interactions III) ion-dipole interactions

Correct AnswerverifiedB

Which corresponds to the temperature-dependent partial pressure above the surface of a liquid?

Correct AnswerverifiedShow Answer

Which substance will exhibit hydrogen bonding between molecules?

Correct AnswerverifiedShow Answer

a.Name the two unit cells which occur in close packing of identical atoms. b.Briefly explain how the two types of close-packed lattices of identical atoms differ,in terms of atomic arrangements.

Correct Answerverifieda.face-centered cubic; hexagonal b.Cubic...View AnswerShow Answer

The location that indicates conditions under which two phases can exist in equilibrium is called the

Correct AnswerverifiedShow Answer

Palladium crystallizes in a face-centered cubic unit cell.Its density is 12.0 g/cm3 at 27°C.What is the atomic radius of Pd?

Correct AnswerverifiedShow Answer

Crystals of elemental sulfur are easily crushed,and melt at 113°C.Liquid sulfur does not conduct electricity.What kind of crystal is this?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Ammonia's unusually high melting point is the result of

Correct AnswerverifiedShow Answer

________________ _________ are the attractions that hold particles together in condensed phases.

Correct AnswerverifiedIntermolec...View AnswerShow Answer

The molar enthalpy of vaporization of hexane (C6H14) is 28.9 kJ/mol,and its normal boiling point is 68.73°C.What is the vapor pressure of hexane at 25°C? (R = 8.314 J/K • mol)

Correct AnswerverifiedShow Answer

What name is given to a quantitative measure of the elastic force in the surface of a liquid?

Correct AnswerverifiedShow Answer

What name is given to the phenomenon where a thin film of water contracts and adheres to the wall of a glass cylinder?

Correct AnswerverifiedD

The energy of a hydrogen bond is greater than that of a typical covalent bond.

Correct AnswerverifiedShow Answer

Which statement concerning the vapor pressures of water and methanol (CH3OH) is true?

Correct AnswerverifiedE

What is the name given to the attractive forces that hold particles together in the condensed phase?

Correct AnswerverifiedShow Answer

The zincblende structure of ZnS has the relatively large sulfide ions arranged at the lattice points of a face-centered cubic structure.The edge length of this cubic unit cell is 540.9 pm.Determine the density of zincblende.

Correct AnswerverifiedShow Answer

Which are considered van der Waals forces? I.dispersion forces II) dipole-dipole interactions III) hydrogen bonding

Correct AnswerverifiedShow Answer

Lead crystallizes in the face-centered cubic lattice.What is the coordination number for Pb?

Correct AnswerverifiedShow Answer

The triple point of iodine is at 0.12 atm and 115°C.Thus,liquid I₂

Correct Answer
verified

Correct Answer
verified
B

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
a.face-centered cubic; hexagonal b.Cubic...
View Answer

Correct Answer
verified

Palladium crystallizes in a face-centered cubic unit cell.Its density is 12.0 g/cm³ at 27°C.What is the atomic radius of Pd?

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

________ _ are the attractions that hold particles together in condensed phases.

Correct Answer
verified
Intermolec...
View Answer

The molar enthalpy of vaporization of hexane (C₆H₁₄) is 28.9 kJ/mol,and its normal boiling point is 68.73°C.What is the vapor pressure of hexane at 25°C? (R = 8.314 J/K • mol)

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
D

Correct Answer
verified

Which statement concerning the vapor pressures of water and methanol (CH₃OH) is true?

Correct Answer
verified
E

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified