Question 1

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)  mixtureF) C) and D)
G) All of the above

Question 2

Which of the substances would form a metallic solid?

Accepted Answer

A)  NCl3
B)  KCl
C)  Ni
D)  Ar
E)  MgF2F) C) and D)
G) D) and E)

Question 3

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)  sublimationF) A) and B)
G) C) and E)

Question 4

Which of the substances would form an ionic solid?

Accepted Answer

A)  NCl3
B)  NH4Cl
C)  Ag
D)  He
E)  OF2F) B) and E)
G) C) and D)

Question 5

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.F) A) and B)
G) None of the above

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

Question 7

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)  sublimationF) A) and C)
G) C) and E)

Question 8

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 9

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 JF) C) and E)
G) A) and E)

Question 10

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°CF) B) and D)
G) B) and E)

Question 11

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) C) and D)
G) All of the above

Question 12

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 2F) B) and D)
G) C) and D)

Question 13

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

Question 14

Which substance has the lowest vapor pressure at room temperature?

Accepted Answer

A)  HF
B)  HCl
C)  HBr
D)  HI
E)  H2F) B) and D)
G) None of the above

Question 15

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 kJF) None of the above
G) B) and E)

Question 16

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 solidsF) A) and B)
G) A) and C)

Question 17

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 > CH4F) A) and B)
G) B) and E)

Question 18

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 E)
G) B) and D)

Question 19

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

Question 20

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°CF) B) and C)
G) D) and E)

Exam 7: Solids, Liquids, and Phase Changes

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

Correct AnswerverifiedShow Answer

Ammonia's unusually high melting point is the result of

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

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

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

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

The specific heat (capacity) is

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

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Which of the following statements is ?

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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

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

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

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Which substance has the lowest vapor pressure at room temperature?

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Which of the substances would form an ionic solid?

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Which of the substances would form a metallic solid?

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

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

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

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

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