Question 1

Gold crystallizes in a face-centred cubic structure.What is the edge length of the unit cell if the atomic radius of gold is 144 pm?

Accepted Answer

A)  204 pm
B)  288 pm
C)  333 pm
D)  407 pmE) A) and C)
F) B) and C)

Question 2

How many H- ions are around each Na+ ion in NaH,which has a cubic unit cell with H- ions on each corner and each face?

Accepted Answer

A)  1
B)  4
C)  6
D)  8E) All of the above
F) B) and D)

Question 3

Which type of bonding does Sr form upon solidification?

Accepted Answer

A)  covalent network
B)  ionic
C)  metallic
D)  molecularE) C) and D)
F) A) and D)

Question 4

The process in which a gas is transformed into a solid is called ________.

Accepted Answer

A)  vaporization
B)  condensation
C)  solidification
D)  deposition
E)  fusionF) All of the above
G) A) and C)

Question 5

According to the phase diagram given,which of the following is INCORRECT?

Accepted Answer

A)  At the temperature and pressure of point 1,substance U exists as a three-phase equilibrium system.
B)  At the temperature and pressure of point 2,substance U exists as a one-phase gaseous system.
C)  At the temperature and pressure of point 3,substance U exists as a two-phase system.
D)  If the U(s) ⇔ U(l) system is maintained at the temperature of point 4 while pressure is decreased steadily to about 300 Torr,more U will freeze.
E)  There are no conditions of temperature and pressure under which solid U will vaporize without melting first.F) B) and D)
G) A) and B)

Question 6

Given the data below,determine the normal boiling point of liquid Rb.
P1 = 400 mmHg,t1 = 620 °C,ΔvapH = 78.5 kJ/mol

Accepted Answer

A)  374 °C
B)  920 °C
C)  647 °C
D)  951 °C
E)  678 °CF) B) and E)
G) A) and B)

Question 7

Consider a parallelepiped with all edges being equal in length.There is an atom at each corner and one in the center.This is a simple cubic cell.

Accepted Answer

A) True 
 B)False

Question 8

Which of the following describe the critical point of a liquid?
I.the temperature and pressure at which a liquid's meniscus disappears
II.the point where the vapor pressure curve intersects the fusion temperature curve
III.the highest temperature and pressure at which a liquid can exist
IV.the highest temperature at which it is possible to obtain a liquid from its vapor by increasing pressure

Accepted Answer

A)  I,II,III
B)  I,III,IV
C)  II,III
D)  II,III,IV
E)  I,IVF) B) and E)
G) A) and E)

Question 9

The maximum temperature at which a gas can be liquefied is just below the ________.

Accepted Answer

A)  boiling temperature
B)  critical temperature
C)  melting temperature
D)  normal temperature
E)  superheating temperatureF) A) and D)
G) A) and C)

Question 10

A compound of iron and sulfur crystallizes in a lattice pattern described as cubic closest packed sulfide ions,with iron ions in all octahedral sites.What is its empirical formula?

Accepted Answer

A)  FeS
B)  FeS2 
C)  Fe3S4 
D)  Fe2S
E)  Fe2S3 F) B) and E)
G) A) and B)

Question 11

Which of the following statements concerning molecules in the liquid state is true?

Accepted Answer

A)  Cohesive forces are not important.
B)  The molecules contract to fit the size of the container.
C)  The molecules have no motion.
D)  The molecules are in a patterned (oriented) arrangement.
E)  The molecules are mobile and relatively close together.F) D) and E)
G) B) and E)

Question 12

Which probably has the lowest boiling point at 1.0 atm pressure?

Accepted Answer

A)  PbH4 
B)  SnH4 
C)  SiH4 
D)  GeH4 
E)  CH4 F) B) and D)
G) A) and B)

Question 13

Which combination of "type of solid" and specific example is INCORRECT?

Accepted Answer

A)  ionic/"table salt"
B)  metallic/copper wire
C)  molecular/"dry ice"
D)  network covalent/iodine
E)  network covalent/silicon carbideF) A) and C)
G) C) and D)

Question 14

List the following ionic compounds in order of increasing solubility in water:
RbI,CaO,KCl

Accepted Answer

A)  RbI,CaO,KCl
B)  KCl,CaO,RbI
C)  KCl,RbI,CaO
D)  CaO,KCl,RbI
E)  RbI,KCl,CaOF) C) and D)
G) B) and E)

Question 15

The enthalpy of fusion is:

Accepted Answer

A)  the quantity of heat required to melt one mole of a solid
B)  the quantity of heat released when a solid melts
C)  the quantity of heat when two elements are fused together to produce binary compound
D)  the quantity of heat required to fuse two atomic nuclei
E)  the quantity of heat released when an organic compound burns in an atmosphere of pure oxygenF) A) and B)
G) D) and E)

Question 16

The heat of deposition equals the negative of the heat of sublimation.

Accepted Answer

A) True 
 B)False

Question 17

Which of the following keeps the rate of vaporization unchanged?

Accepted Answer

A)  closing container lid
B)  increasing forces between molecules
C)  increasing mass of molecule
D)  decreasing temperature
E)  decreasing surface areaF) A) and B)
G) All of the above

Question 18

Given the following information,calculate ΔH° (in kcal mol-1) for: I(g) + e- → I-(g) 
-1) for: I(g) + e- → I-(g)    A) -633 kcal mol-1 B) -450 kcal mol-1 C) -71 kcal mol-1 D) -696 kcal mol-1 E) +712 kcal mol-1" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  -633 kcal mol-1
B)  -450 kcal mol-1
C)  -71 kcal mol-1
D)  -696 kcal mol-1
E)  +712 kcal mol-1F) None of the above
G) A) and B)

Question 19

Which of the following forms an ionic solid?

Accepted Answer

A)  Cu
B)  C2H5NH2
C)  NH4NO3
D)  NO2E) A) and B)
F) A) and C)

Question 20

The relationship between the vapor pressure of a liquid and temperature can be expressed by the Clausius-Clapeyron equation:
Ln[P2/P1] = [ΔvapH/R] × [1/T1 - 1/T2]
Ethanol (C2H5OH) has a normal boiling point of 78.3 °C and,with ΔvapH = 39.3 kJ/mol.What is the vapor pressure of ethanol at 50.0 °C?

Accepted Answer

A)  118 Torr
B)  234 Torr
C)  354 Torr
D)  485 Torr
E)  670 TorrF) A) and B)
G) A) and C)

Exam 12: Intermolecular Forces: Liquids and Solids

Which of the following keeps the rate of vaporization unchanged?

Correct Answer
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Correct Answer
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Which probably has the lowest boiling point at 1.0 atm pressure?

Correct Answer
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Given the following information,calculate ΔH° (in kcal mol^-1) for: I(g) + e^- → I^-(g)

Correct Answer
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List the following ionic compounds in order of increasing solubility in water: RbI,CaO,KCl

Correct Answer
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Consider a parallelepiped with all edges being equal in length.There is an atom at each corner and one in the center.This is a simple cubic cell.

Correct Answer
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Given the data below,determine the normal boiling point of liquid Rb. P₁ = 400 mmHg,t₁ = 620 °C,Δ_vapH = 78.5 kJ/mol

Correct Answer
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Which combination of "type of solid" and specific example is INCORRECT?

Correct Answer
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The process in which a gas is transformed into a solid is called ________.

Correct Answer
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Which of the following forms an ionic solid?

Correct Answer
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Gold crystallizes in a face-centred cubic structure.What is the edge length of the unit cell if the atomic radius of gold is 144 pm?

Correct Answer
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Correct Answer
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The maximum temperature at which a gas can be liquefied is just below the ________.

Correct Answer
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Which of the following statements concerning molecules in the liquid state is true?

Correct Answer
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Which type of bonding does Sr form upon solidification?

Correct Answer
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The enthalpy of fusion is:

Correct Answer
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The heat of deposition equals the negative of the heat of sublimation.

Correct Answer
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How many H^- ions are around each Na⁺ ion in NaH,which has a cubic unit cell with H^- ions on each corner and each face?

Correct Answer
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A compound of iron and sulfur crystallizes in a lattice pattern described as cubic closest packed sulfide ions,with iron ions in all octahedral sites.What is its empirical formula?

Correct Answer
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According to the phase diagram given,which of the following is INCORRECT?

Correct Answer
verified

Exam 12: Intermolecular Forces: Liquids and Solids

Which of the following keeps the rate of vaporization unchanged?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which probably has the lowest boiling point at 1.0 atm pressure?

Correct AnswerverifiedShow Answer

Given the following information,calculate ΔH° (in kcal mol-1) for: I(g) + e- → I-(g)

Correct AnswerverifiedShow Answer

List the following ionic compounds in order of increasing solubility in water: RbI,CaO,KCl

Correct AnswerverifiedShow Answer

Consider a parallelepiped with all edges being equal in length.There is an atom at each corner and one in the center.This is a simple cubic cell.

Correct AnswerverifiedShow Answer

Given the data below,determine the normal boiling point of liquid Rb. P1 = 400 mmHg,t1 = 620 °C,ΔvapH = 78.5 kJ/mol

Correct AnswerverifiedShow Answer

Which combination of "type of solid" and specific example is INCORRECT?

Correct AnswerverifiedShow Answer

The process in which a gas is transformed into a solid is called ________.

Correct AnswerverifiedShow Answer

Which of the following forms an ionic solid?

Correct AnswerverifiedShow Answer

Gold crystallizes in a face-centred cubic structure.What is the edge length of the unit cell if the atomic radius of gold is 144 pm?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The maximum temperature at which a gas can be liquefied is just below the ________.

Correct AnswerverifiedShow Answer

Which of the following statements concerning molecules in the liquid state is true?

Correct AnswerverifiedShow Answer

Which type of bonding does Sr form upon solidification?

Correct AnswerverifiedShow Answer

The enthalpy of fusion is:

Correct AnswerverifiedShow Answer

The heat of deposition equals the negative of the heat of sublimation.

Correct AnswerverifiedShow Answer

How many H- ions are around each Na+ ion in NaH,which has a cubic unit cell with H- ions on each corner and each face?

Correct AnswerverifiedShow Answer

A compound of iron and sulfur crystallizes in a lattice pattern described as cubic closest packed sulfide ions,with iron ions in all octahedral sites.What is its empirical formula?

Correct AnswerverifiedShow Answer

According to the phase diagram given,which of the following is INCORRECT?

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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Given the following information,calculate ΔH° (in kcal mol^-1) for: I(g) + e^- → I^-(g)

Correct Answer
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Correct Answer
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Correct Answer
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Given the data below,determine the normal boiling point of liquid Rb. P₁ = 400 mmHg,t₁ = 620 °C,Δ_vapH = 78.5 kJ/mol

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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How many H^- ions are around each Na⁺ ion in NaH,which has a cubic unit cell with H^- ions on each corner and each face?

Correct Answer
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Correct Answer
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Correct Answer
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