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 3OHF) D) and E)
G) A) and C) D

Question 2

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 3

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 4

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)  8F) D) and E)
G) A) and B)

Question 5

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 cubicF) None of the above
G) C) and E)

Question 6

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 kJF) B) and C)
G) B) and E)

Question 7

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.F) C) and D)
G) A) and D)

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

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/molF) A) and B)
G) A) and C)

Question 10

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

Accepted Answer

A)  Br2
B)  Cl2
C)  F2
D)  I2E) A) and B)
F) None of the above

Question 11

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.F) B) and E)
G) C) and D) A

Question 12

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)  RbIF) B) and D)
G) A) and D)

Question 13

What phase exists at the point labeled b?

Accepted Answer

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

Question 14

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 15

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°F) C) and D)
G) D) and E)

Question 16

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

Accepted Answer

Question 17

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/cm3F) None of the above
G) B) and C)

Question 18

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

Accepted Answer

Question 19

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)  ArF) C) and D)
G) A) and B) C

Question 20

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 
D)  CH4 6H4(OH) 2 2O 
E)  CH4 6H4(OH) 2 2OF) A) and C)
G) None of the above

Exam 11: Intermolecular Forces and Liquids and Solids

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

Correct AnswerverifiedD

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

Correct AnswerverifiedShow Answer

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.

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedWater would have the...View AnswerShow Answer

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.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedA

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

Correct AnswerverifiedShow Answer

What phase exists at the point labeled b?

Correct AnswerverifiedShow Answer

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.

Correct Answerverified36°C (the ...View AnswerShow Answer

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?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedC

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

Correct AnswerverifiedShow Answer

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

Correct Answer
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D

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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.

Correct Answer
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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?

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

Correct Answer
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Water would have the...
View Answer

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A

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36°C (the ...
View Answer

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

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

Correct Answer
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C

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

Correct Answer
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