Question 1

A passage of substance directly from the vapor to the solid state is known as:

Accepted Answer

A)  deposition
B)  decomposition
C)  sublimation
D)  solidification
E)  fusionF) B) and E)
G) A) and D)

Question 2

The triple point of H2O is at 4.58 mmHg and +0.01 °C.Some H2O at -50 °C is heated to 120 °C at a constant pressure of 0.5 atm.The changes of state occurring in this process are:

Accepted Answer

A)  solid to gas
B)  solid to liquid to gas
C)  liquid to gas
D)  solid to liquid
E)  gas to liquid to solidF) A) and B)
G) D) and E)

Question 3

When a liquid is in equilibrium with its vapor in a closed container:

Accepted Answer

A)  the rate at which molecules from the liquid phase enter the gas phase exactly equals the rate at which molecules from the gas phase pass into the liquid phase
B)  a change in temperature will not change the pressure in the container
C)  the amount of gas in the container must exactly equal the amount of liquid
D)  molecules cannot go from the liquid phase to the gas phase because the amount of liquid in the container is constant
E)  the vapor will gradually change back to the liquid state,that is,no vapor will be leftF) None of the above
G) A) and B)

Question 4

Given the following information,calculate ΔH° (in kcal mol-1) for: I(g) + e- → I-(g) 
-1) for: I(g) + e- → I-(g)    A) -715 kcal mol-1 B) -338 kcal mol-1 C) -89 kcal mol-1 D) -71 kcal mol-1 E) -142 kcal mol-1" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  -715 kcal mol-1
B)  -338 kcal mol-1
C)  -89 kcal mol-1
D)  -71 kcal mol-1
E)  -142 kcal mol-1F) B) and C)
G) A) and E)

Question 5

Arrange in order by decreasing boiling point:
CH3CH2OH,HOCH2CH2OH,C4H10

Accepted Answer

A)  HOCH2CH2OH,CH3CH2OH,C4H10 
B)  C4H10,HOCH2CH2OH,CH3CH2OH
C)  HOCH2CH2OH,C4H10,CH3CH2OH
D)  C4H10,CH3CH2OH,HOCH2CH2OH
E)  CH3CH2OH,C4H10,HOCH2CH2OHF) A) and E)
G) B) and D)

Question 6

Which of the following compounds has the highest boiling point?

Accepted Answer

A)  H2O
B)  HI
C)  Sb H3
D)  SnH4E) A) and B)
F) B) and D)

Question 7

Choose the INCORRECT statement.

Accepted Answer

A)  In a network covalent solid,covalent bonds extend throughout the crystalline solid.
B)  Diamond has sp3 hybridization.
C)  Graphite has sp hybridization.
D)  Fullerenes are a recently discovered allotropic form of carbons.
E)  Nanotubes are an allotropic form of carbon.F) A) and E)
G) D) and E) C

Question 8

Based on the figure above,the boiling point of ethyl alcohol under an external pressure of 0.0742 bar Is approximately

Accepted Answer

A)  80
B)  60
C)  70
D)  40
E)  20F) A) and B)
G) A) and E)

Question 9

If 34 g of a solid with a molar mass = 174 g/mol requires 21.3 kJ to melt it,what is the molar heat of fusion in kJ/mol?

Accepted Answer

A)  (21.3) (174) (34) kJ/mol
B)  (21.3/174) (34) kJ/mol
C)  (21.3/174) /34 kJ/mol
D)  (21.3) (174/34) kJ/mol
E)  (34/21.3) (174) kJ/molF) A) and D)
G) C) and E)

Question 10

Below are given the Lewis structures of five molecules.Which one displays the MOST hydrogen bonding?

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) C) and D)
G) All of the above

Question 11

Surface tension of a liquid is the work or energy required to increase the surface area of a liquid.

Accepted Answer

A) True 
 B)False

Question 12

NaCl crystallizes in a cubic unit cell with Cl- ions on each corner and each face.How many Na+ and Cl- ions are in each unit cell of NaCl?

Accepted Answer

A)  1 Na+ ion and 1 Cl- ion
B)  2 Na+ ions and 2 Cl- ions
C)  4 Na+ ions and 4 Cl- ions
D)  8 Na+ ions and 8 Cl- ionsE) C) and D)
F) All of the above

Question 13

Nickel has a face-centred cubic structure and has a density of 8.90 g cm-3.What is its atomic radius?

Accepted Answer

A)  125 pm
B)  249 pm
C)  353 pm
D)  997 pmE) A) and B)
F) A) and C)

Question 14

Find a FALSE statement about X-rays.

Accepted Answer

A)  diffracted by crystals
B)  radiation of wavelength approximating 1 angstrom
C)  visible to the naked eye
D)  used to determine the structure of molecules
E)  produced using high-energy electronsF) A) and E)
G) All of the above

Question 15

An arrangement in which every other layer is identical (ABABABAB) is ________.

Accepted Answer

A)  octahedral holes
B)  tetrahedral holes
C)  hexagonal close packed
D)  cubic close packing
E)  cubic face centeredF) A) and C)
G) A) and E)

Question 16

The temperature at which the vapor pressure of a liquid equals the external pressure is called the ________.

Accepted Answer

A)  boiling point
B)  critical point
C)  melting point
D)  sublimation point
E)  thermal pointF) A) and E)
G) A) and C) A

Question 17

A liquid has a normal boiling point of 78 °C and its vapor pressure is 400 mmHg at 50 °C.To compute the molar heat of vaporization,one needs:

Accepted Answer

A)  the mole weight
B)  the vapor pressure at another temperature
C)  the specific heat
D)  molarity
E)  all information has been providedF) A) and B)
G) None of the above

Question 18

Arrange the following compounds in order of increasing boiling point: 
HCl,HBr,HI.

Accepted Answer

A)  HCl,HBr,HI
B)  HBr,HI,HCl
C)  HI,HBr,HCl
D)  HCl,HI,HBr
E)  HI,HCl,HBrF) A) and D)
G) None of the above A

Question 19

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

Accepted Answer

A)  fusion
B)  condensation
C)  sublimation
D)  solidification
E)  repositionF) A) and E)
G) None of the above

Question 20

Van der Waals forces are a type of London force.

Accepted Answer

A) True 
 B)False

Exam 12: Intermolecular Forces: Liquids and Solids

A passage of substance directly from the vapor to the solid state is known as:

Correct AnswerverifiedShow Answer

The triple point of H2O is at 4.58 mmHg and +0.01 °C.Some H2O at -50 °C is heated to 120 °C at a constant pressure of 0.5 atm.The changes of state occurring in this process are:

Correct AnswerverifiedShow Answer

When a liquid is in equilibrium with its vapor in a closed container:

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Arrange in order by decreasing boiling point: CH3CH2OH,HOCH2CH2OH,C4H10

Correct AnswerverifiedShow Answer

Which of the following compounds has the highest boiling point?

Correct AnswerverifiedShow Answer

Choose the INCORRECT statement.

Correct AnswerverifiedC

Based on the figure above,the boiling point of ethyl alcohol under an external pressure of 0.0742 bar Is approximately

Correct AnswerverifiedShow Answer

If 34 g of a solid with a molar mass = 174 g/mol requires 21.3 kJ to melt it,what is the molar heat of fusion in kJ/mol?

Correct AnswerverifiedShow Answer

Below are given the Lewis structures of five molecules.Which one displays the MOST hydrogen bonding?

Correct AnswerverifiedShow Answer

Surface tension of a liquid is the work or energy required to increase the surface area of a liquid.

Correct AnswerverifiedShow Answer

NaCl crystallizes in a cubic unit cell with Cl- ions on each corner and each face.How many Na+ and Cl- ions are in each unit cell of NaCl?

Correct AnswerverifiedShow Answer

Nickel has a face-centred cubic structure and has a density of 8.90 g cm-3.What is its atomic radius?

Correct AnswerverifiedShow Answer

Find a FALSE statement about X-rays.

Correct AnswerverifiedShow Answer

An arrangement in which every other layer is identical (ABABABAB) is ________.

Correct AnswerverifiedShow Answer

The temperature at which the vapor pressure of a liquid equals the external pressure is called the ________.

Correct AnswerverifiedA

A liquid has a normal boiling point of 78 °C and its vapor pressure is 400 mmHg at 50 °C.To compute the molar heat of vaporization,one needs:

Correct AnswerverifiedShow Answer

Arrange the following compounds in order of increasing boiling point: HCl,HBr,HI.

Correct AnswerverifiedA

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

Correct AnswerverifiedShow Answer

Van der Waals forces are a type of London force.

Correct AnswerverifiedShow Answer

Correct Answer
verified

The triple point of H₂O is at 4.58 mmHg and +0.01 °C.Some H₂O at -50 °C is heated to 120 °C at a constant pressure of 0.5 atm.The changes of state occurring in this process are:

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified

Arrange in order by decreasing boiling point: CH₃CH₂OH,HOCH₂CH₂OH,C₄H₁₀

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
C

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

NaCl crystallizes in a cubic unit cell with Cl^- ions on each corner and each face.How many Na⁺ and Cl^- ions are in each unit cell of NaCl?

Correct Answer
verified

Nickel has a face-centred cubic structure and has a density of 8.90 g cm^-3.What is its atomic radius?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
A

Correct Answer
verified

Correct Answer
verified
A

Correct Answer
verified

Correct Answer
verified