Question 1

Explain why there is no change in temperature during a phase change.

Accepted Answer

The temperature of a system does not cha...

Question 2

The intermolecular forces that hold a liquid together are called _____.

Accepted Answer

The answer of The intermolecular forces that hold a liquid...

Question 3

HCl is a liquid at room temperature and 1 atm pressure.

Accepted Answer

A) True 
 B)False

Question 4

What is the natural logarithm of inverse of 25.68?

Accepted Answer

A)   -3.246
B)   3.246
C)   -25.68
D)   -32.46
E)   2.568F) D) and E)
G) None of the above

Question 5

The vapor pressure of liquid water at 58.0˚C and 73.0˚C is 136.1 and 265.7 torr respectively. The vapor pressure of liquid water at 69.0˚C is _____ torr.

Accepted Answer

A)   137
B)   425
C)   223
D)   265
E)   416F) A) and C)
G) B) and E)

Question 6

Which of the following is a volatile liquid?

Accepted Answer

A)   Glycerine
B)   Acetone
C)   Ethylene glycol
D)   Water at 60oC
E)   MercuryF) C) and D)
G) C) and E)

Question 7

A(n)  _____ refers to an unstable liquid at a temperature and pressure at which it should be a gas.

Accepted Answer

A)   ionic liquid
B)   superheated liquid
C)   supercooled liquid
D)   supercritical fluid
E)   viscous liquidF) A) and D)
G) A) and C)

Question 8

The degree of molecular ordering increases from nematic phase to the cholesteric phase.

Accepted Answer

A) True 
 B)False

Question 9

Intramolecular forces hold molecules together in a liquid.

Accepted Answer

A) True 
 B)False

Question 10

A gas phase is favored at high pressure and low temperature.

Accepted Answer

A) True 
 B)False

Question 11

In the Clausius-Clapeyron equation, ln P =  (−ΔHvapR) (1T) +C,R\left( \frac { - \Delta H _ { v a p } } { R } \right)  \left( \frac { 1 } { T } \right)  + C { }{ , R}(R−ΔHvap​​) (T1​) +C,R  represents:

Accepted Answer

A)   heat of vaporization
B)   vaporization
C)   absolute temperature
D)   universal gas constant
E)   Clapeyron constant F) B) and E)
G) A) and D)

Question 12

Which of the following statements is true of the capillary action of liquids?

Accepted Answer

A)   The capillary action of a liquid entirely depends on the strength of the adhesive forces.
B)   If the adhesive forces are weaker than the cohesive forces, then the liquid in the capillary rises to the level where the downward force of gravity exactly balances this upward force.
C)   If the cohesive forces are stronger than the adhesive forces, the liquid in the tube will have a convex meniscus.
D)   If the cohesive forces are weaker than the adhesive forces, the liquid pulls itself down into the capillary below the surface of the bulk liquid to minimize contact with the glass.
E)   If the cohesive forces are weaker than the adhesive forces, the liquid in the tube will have a convex meniscus.F) A) and C)
G) C) and D)

Question 13

A supercritical fluid has a density which is almost the same as the density of the gas phase.

Accepted Answer

A) True 
 B)False

Question 14

The combination of the critical temperature and critical pressure of a substance is called its _____.

Accepted Answer

The answer of The combination of the critical temperature and...

Question 15

Which of the following compounds has the highest boiling point?

Accepted Answer

A)   Cyclobutane
B)   Acetone
C)   Dimethyl sulfoxide
D)   Diethylether
E)   Hydrogen cyanideF) None of the above
G) D) and E)

Question 16

Explain with an example, the practical importance of controlling the viscosity of liquids.

Accepted Answer

Students' examples might vary.
Motor oil...

Question 17

Which of the following statements is true regarding the properties of liquids?

Accepted Answer

A)   Liquids are much denser than solids.
B)   Liquids can be readily compressed.
C)   The density of water varies significantly over a narrow temperature range.
D)   Liquids can adopt the volume of their containers.
E)   The mean free path in liquids is very short.F) A) and B)
G) A) and C)

Question 18

How do the relative strengths of cohesive and adhesive forces determine the level to which a liquid rises in a capillary tube?

Accepted Answer

Capillary action is the net result of co...

Question 19

The region that corresponds to a combination of high temperature and low pressure in a phase diagram favours _____ phase.

Accepted Answer

A)   supercritical fluid
B)   gas
C)   supercooled liquid
D)   solid
E)   liquidF) A) and E)
G) B) and D)

Question 20

If the natural logarithm of 16.28 is 2.7899, then e2.7899 is equal to _____.

Accepted Answer

Exam 11: Liquids

Which of the following compounds has the highest boiling point?

Correct AnswerverifiedShow Answer

The region that corresponds to a combination of high temperature and low pressure in a phase diagram favours _____ phase.

Correct AnswerverifiedShow Answer

In the Clausius-Clapeyron equation, ln P = (−ΔHvapR) (1T) +C,R\left( \frac { - \Delta H _ { v a p } } { R } \right) \left( \frac { 1 } { T } \right) + C { }{ , R}(R−ΔHvap​​) (T1​) +C,R represents:

Correct AnswerverifiedShow Answer

HCl is a liquid at room temperature and 1 atm pressure.

Correct AnswerverifiedShow Answer

The vapor pressure of liquid water at 58.0˚C and 73.0˚C is 136.1 and 265.7 torr respectively. The vapor pressure of liquid water at 69.0˚C is _____ torr.

Correct AnswerverifiedShow Answer

A(n) _____ refers to an unstable liquid at a temperature and pressure at which it should be a gas.

Correct AnswerverifiedShow Answer

The degree of molecular ordering increases from nematic phase to the cholesteric phase.

Correct AnswerverifiedShow Answer

Explain with an example, the practical importance of controlling the viscosity of liquids.

Correct AnswerverifiedStudents' examples might vary.Motor oil...View AnswerShow Answer

The intermolecular forces that hold a liquid together are called _____.

Correct AnswerverifiedShow Answer

What is the natural logarithm of inverse of 25.68?

Correct AnswerverifiedShow Answer

Which of the following statements is true regarding the properties of liquids?

Correct AnswerverifiedShow Answer

Explain why there is no change in temperature during a phase change.

Correct AnswerverifiedThe temperature of a system does not cha...View AnswerShow Answer

The combination of the critical temperature and critical pressure of a substance is called its _____.

Correct AnswerverifiedShow Answer

A supercritical fluid has a density which is almost the same as the density of the gas phase.

Correct AnswerverifiedShow Answer

If the natural logarithm of 16.28 is 2.7899, then e2.7899 is equal to _____.

Correct AnswerverifiedShow Answer

A gas phase is favored at high pressure and low temperature.

Correct AnswerverifiedShow Answer

Which of the following statements is true of the capillary action of liquids?

Correct AnswerverifiedShow Answer

Intramolecular forces hold molecules together in a liquid.

Correct AnswerverifiedShow Answer

How do the relative strengths of cohesive and adhesive forces determine the level to which a liquid rises in a capillary tube?

Correct AnswerverifiedCapillary action is the net result of co...View AnswerShow Answer

Which of the following is a volatile liquid?

Correct AnswerverifiedShow Answer

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In the Clausius-Clapeyron equation, ln P = $\left( \frac { - \Delta H _ { v a p } } { R } \right) \left( \frac { 1 } { T } \right) + C { }{ , R}$ represents:

Correct Answer
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Correct Answer
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Students' examples might vary.
Motor oil...
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Correct Answer
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Correct Answer
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The temperature of a system does not cha...
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Correct Answer
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If the natural logarithm of 16.28 is 2.7899, then e^2.7899 is equal to _____.

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Correct Answer
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Correct Answer
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Capillary action is the net result of co...
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Correct Answer
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