Question 1

Which of the following lacks a regular three-dimensional arrangement of atoms?

Accepted Answer

A)  crystalline solids
B)  ionic crystals
C)  solids
D)  amorphous solids
E)  molecular solids

Question 2

The energy required to increase the surface of a liquid per unit area is called the

Accepted Answer

A)  capillary action.
B)  surface tension.
C)  viscosity.
D)  cohesion.
E)  specific elasticity.

Question 3

The specific heat (capacity)  is

Accepted Answer

A)  amount of energy needed to change 1 g of a substance by 1°C.
B)  amount of energy needed to change 1 mol of a substance by 1°C
C)  amount of energy required to melt 1 g of substance.
D)  amount of substance that is heated by 1°C.
E)  the temperature increase, in K, associated with heating 1 g of a substance for 1 minute.

Question 4

Place the substances in order of increasing boiling point. BeF2 SF2 Ar

Accepted Answer

A)  BeF2 2 
B)  Ar 2 2
C)  SF2 2
D)  SF2 2 
E)  Ar 2 2

Question 5

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

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.

Question 6

Which of the following statements is ?

Accepted Answer

A)  The higher the viscosity, the faster a liquid flows.
B)  The viscosity increases with increasing temperature.
C)  The stronger the intermolecular forces, the higher the viscosity.
D)  Hydrogen bonding in water gives rise to its unusually low viscosity.
E)  The viscosity of gases is larger than the viscosity of liquids.

Question 7

Place the substances in order of decreasing boiling point. CO2 CH4 OF2

Accepted Answer

A)  OF2 > CO2 > CH4
B)  CH4 > CO2 > OF2
C)  OF2 > CH4 > CO2
D)  CO2 > CH4 > OF2
E)  CO2 > OF2 > CH4

Question 8

If 325 g of water at 4.2°C absorbs 12.28 kJ, what is the final temperature of the water? The specific heat of water is 4.184 J/g·°C.

Accepted Answer

A)  4.21°C
B)  4.8°C
C)  9.0°C
D)  13.2°C
E)  2938°C

Question 9

Which of the substances would form a metallic solid?

Accepted Answer

A)  NCl3
B)  KCl
C)  Ni
D)  Ar
E)  MgF2

Question 10

What is the process in which molecules undergo a phase change from the liquid phase to the gas phase?

Accepted Answer

A)  vaporization
B)  condensation
C)  freezing
D)  melting
E)  sublimation

Question 11

Ethanol (C2H5-OH) will have a greater viscosity than ethylene glycol (HO-CH2CH2-OH) at the same temperature.

Accepted Answer

A) True 
 B)False

Question 12

How much heat is required to raise the temperature of 1500 g of water from 25°C to 52°C? The specific heat of water is 4.184 J/g·°C.

Accepted Answer

A)  1500 kJ
B)  170 kJ
C)  6.3 kJ
D)  41 J
E)  41 kJ

Question 13

Which substance has the lowest vapor pressure at room temperature?

Accepted Answer

A)  HF
B)  HCl
C)  HBr
D)  HI
E)  H2

Question 14

What is the process in which molecules undergo a phase change from the solid phase to the liquid phase?

Accepted Answer

A)  vaporization
B)  condensation
C)  freezing
D)  melting
E)  sublimation

Question 15

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 action

Question 16

What amount of energy (heat)  is required to warm a 73.5-g sample of liquid ethanol from 15.0ºC to 29.5ºC? The specific heat capacity of ethanol is 2.46 J/gºC.

Accepted Answer

A)  0.485 J
B)  433 J
C)  2.62 × 103 J
D)  5.33 × 103 J
E)  238 J

Question 17

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.

Question 18

Which of the substances would form an ionic solid?

Accepted Answer

A)  NCl3
B)  NH4Cl
C)  Ag
D)  He
E)  OF2

Question 19

Benzene is a starting material in the synthesis of nylon fibers and polystyrene (styrofoam) .Its specific heat capacity is 1.74 J/g·°C.If 16.7 kJ of energy is absorbed by a 225-g sample of benzene at 20.0°C, what is its final temperature?

Accepted Answer

A)  −22.7°C
B)  37.7°C
C)  42.7°C
D)  62.7°C
E)  80.1°C

Question 20

Which state of matter is described as taking on the shape of its container, but having a specific volume?

Accepted Answer

A)  solid
B)  liquid
C)  gas
D)  solution
E)  mixture

Exam 7: Solids, Liquids, and Phase Changes

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

Correct AnswerverifiedShow Answer

What amount of energy (heat) is required to warm a 73.5-g sample of liquid ethanol from 15.0ºC to 29.5ºC? The specific heat capacity of ethanol is 2.46 J/gºC.

Correct AnswerverifiedShow Answer

Which of the substances would form an ionic solid?

Correct AnswerverifiedShow Answer

Which state of matter is described as taking on the shape of its container, but having a specific volume?

Correct AnswerverifiedShow Answer

Ethanol (C2H5-OH) will have a greater viscosity than ethylene glycol (HO-CH2CH2-OH) at the same temperature.

Correct AnswerverifiedShow Answer

What is the process in which molecules undergo a phase change from the solid phase to the liquid phase?

Correct AnswerverifiedShow Answer

The specific heat (capacity) is

Correct AnswerverifiedShow Answer

How much heat is required to raise the temperature of 1500 g of water from 25°C to 52°C? The specific heat of water is 4.184 J/g·°C.

Correct AnswerverifiedShow Answer

Which substance has the lowest vapor pressure at room temperature?

Correct AnswerverifiedShow Answer

Which of the substances would form a metallic solid?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

If 325 g of water at 4.2°C absorbs 12.28 kJ, what is the final temperature of the water? The specific heat of water is 4.184 J/g·°C.

Correct AnswerverifiedShow Answer

Which of the following statements is ?

Correct AnswerverifiedShow Answer

What is the process in which molecules undergo a phase change from the liquid phase to the gas phase?

Correct AnswerverifiedShow Answer

Place the substances in order of decreasing boiling point. CO2 CH4 OF2

Correct AnswerverifiedShow Answer

Which of the following lacks a regular three-dimensional arrangement of atoms?

Correct AnswerverifiedShow Answer

Place the substances in order of increasing boiling point. BeF2 SF2 Ar

Correct AnswerverifiedShow Answer

Ammonia's unusually high melting point is the result of

Correct AnswerverifiedShow Answer

The energy required to increase the surface of a liquid per unit area is called the

Correct AnswerverifiedShow Answer

Benzene is a starting material in the synthesis of nylon fibers and polystyrene (styrofoam) .Its specific heat capacity is 1.74 J/g·°C.If 16.7 kJ of energy is absorbed by a 225-g sample of benzene at 20.0°C, what is its final temperature?

Correct AnswerverifiedShow Answer

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

Correct Answer
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Ethanol (C₂H₅-OH) will have a greater viscosity than ethylene glycol (HO-CH₂CH₂-OH) at the same temperature.

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Place the substances in order of decreasing boiling point. CO₂ CH₄ OF₂

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Place the substances in order of increasing boiling point. BeF₂ SF₂ Ar

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