Question Details

Answered: - 4/5/2016 Week Seven Week Seven Due: 11:59pm on Monday, Apr


Dear Expert_guidance,?

I hope you are feeling better. I've attached exercises from week 7 that I need help with. These are not due until next week so we have plenty of time. Please let me know if you are able to help.

Thanks!


4/5/2016

 


 

Week Seven

 


 

Week Seven

 

Due: 11:59pm on Monday, April 11, 2016

 

You will receive no credit for items you complete after the assignment is due. Grading Policy

 


 

Exercise 11.9

 


 

Part A

 

Why are intermolecular forces generally much weaker than bonding forces?

 

ANSWER:

 

Essay answers are limited to about 500 words (3800 characters maximum, including spaces).

 

3785 Character(s) remaining

 

(none provided)

 


 

Exercise 11.50

 

Determine the kinds of intermolecular forces that are present in each element or compound.

 


 

Part A

 


 

ANSWER:

 

dispersion forces

 

dipole?dipole forces

 

dispersion forces and dipole?dipole forces

 

dispersion forces, dipole?dipole forces, and hydrogen bonding

 


 

Part B

 

ANSWER:

 

dispersion forces

 

dipole?dipole forces

 

dispersion forces and dipole?dipole forces

 

dispersion forces, dipole?dipole forces, and hydrogen bonding

 


 

Part C

 


 

ANSWER:

 


 

https://session.masteringchemistry.com/myct/assignmentPrintView?displayMode=studentView&assignmentID=4212449

 


 

1/13

 


 

4/5/2016

 


 

Week Seven

 


 

dispersion forces

 

dipole?dipole forces

 

dispersion forces and dipole?dipole forces

 

dispersion forces, dipole?dipole forces, and hydrogen bonding

 


 

Part D

 

ANSWER:

 

dispersion forces

 

dipole?dipole forces

 

dispersion forces and dipole?dipole forces

 

dispersion forces, dipole?dipole forces, and hydrogen bonding

 


 

Exercise 11.54

 

Arrange the following in order of increasing boiling point.

 


 

Part A

 

,

 


 

,

 


 

ANSWER:

 


 

Part B

 

This question will be shown after you complete previous question(s).

 


 

Exercise 11.58

 

Part A

 

For the following pair of compounds, pick the one with the higher vapor pressure at a given temperature:

 


 

or

 


 

.

 


 

ANSWER:

 


 

Part B

 

This question will be shown after you complete previous question(s).

 


 

https://session.masteringchemistry.com/myct/assignmentPrintView?displayMode=studentView&assignmentID=4212449

 


 

2/13

 


 

4/5/2016

 


 

Week Seven

 


 

Part C

 

For the following pair of compounds, pick the one with the higher vapor pressure at a given temperature:

 


 

or

 


 

.

 


 

ANSWER:

 


 

Part D

 

This question will be shown after you complete previous question(s).

 


 

Part E

 

For the following pair of compounds, pick the one with the higher vapor pressure at a given temperature:

 


 

or

 


 

.

 


 

ANSWER:

 


 

Part F

 

This question will be shown after you complete previous question(s).

 


 

Exercise 11.60

 


 

Part A

 

Which of the following pairs of compounds would you expect to form homogeneous solutions when combined?

 

(a)

 

and

 


 

(b)

 

and

 


 

(c)

 

and

 


 

(d)

 

and

 

Drag the items into the appropriate bins.

 

ANSWER:

 


 

https://session.masteringchemistry.com/myct/assignmentPrintView?displayMode=studentView&assignmentID=4212449

 


 

3/13

 


 

4/5/2016

 


 

Week Seven

 


 

Part B

 

This question will be shown after you complete previous question(s).

 


 

Exercise 11.17

 


 

Part A

 

What is capillary action? How does it depend on the relative strengths of adhesive and cohesive forces?

 

ANSWER:

 

Essay answers are limited to about 500 words (3800 characters maximum, including spaces).

 

3785 Character(s) remaining

 

(none provided)

 


 

Exercise 11.62

 

Water (a) ?wets? some surfaces and beads up on others. Mercury (b), in contrast, beads up on almost all surfaces.

 


 

https://session.masteringchemistry.com/myct/assignmentPrintView?displayMode=studentView&assignmentID=4212449

 


 

4/13

 


 

4/5/2016

 


 

Week Seven

 


 

Part A

 

Explain this difference.

 

ANSWER:

 

Essay answers are limited to about 500 words (3800 characters maximum, including spaces).

 

3785 Character(s) remaining

 

(none provided)

 


 

Exercise 11.63

 

The structures of two isomers of heptane are shown below .

 


 

Part A

 

Which of these two compounds would you expect to have the greater viscosity?

 

ANSWER:

 

the first compound

 

the second compound

 


 

Exercise 11.66

 

When a thin glass tube is put into water, the water rises 1.4

 


 

. When the same tube is put into hexane, the hexane rises only 0.4

 


 

https://session.masteringchemistry.com/myct/assignmentPrintView?displayMode=studentView&assignmentID=4212449

 


 

.

 

5/13

 


 

4/5/2016

 


 

Week Seven

 


 

Part A

 

Explain the difference.

 

ANSWER:

 

Essay answers are limited to about 500 words (3800 characters maximum, including spaces).

 

3785 Character(s) remaining

 

(none provided)

 


 

Exercise 11.19

 


 

Part A

 

Why is vaporization endothermic? Why is condensation exothermic?

 

ANSWER:

 

Essay answers are limited to about 500 words (3800 characters maximum, including spaces).

 

3785 Character(s) remaining

 

(none provided)

 


 

Exercise 11.24

 


 

Part A

 

How is vapor pressure related to temperature? What happens to the vapor pressure of a substance when the temperature is increased? Decreased?

 

Check all that apply.

 

ANSWER:

 

The relationship between vapor pressure and temperature is linear.

 

The relationship between vapor pressure and temperature is not linear, but rather, it is exponential.

 

The vapor pressure of a liquid decreases with increasing temperature.

 

The vapor pressure of a liquid increases with increasing temperature.

 


 

Exercise 11.29

 


 

Part A

 

What is fusion?

 

ANSWER:

 


 

https://session.masteringchemistry.com/myct/assignmentPrintView?displayMode=studentView&assignmentID=4212449

 


 

6/13

 


 

4/5/2016

 


 

Week Seven

 


 

Fusion is the phase transition from solid to gas.

 

Fusion is the phase transition from gas to solid.

 

Fusion is the phase transition from liquid to solid.

 

Fusion is the phase transition from gas to liquid.

 

Fusion is the phase transition from solid to liquid.

 


 

Part B

 

Is fusion exothermic or endothermic? Why?

 

ANSWER:

 

Essay answers are limited to about 500 words (3800 characters maximum, including spaces).

 

3785 Character(s) remaining

 

(none provided)

 


 

Exercise 11.68

 


 

Part A

 

Which will evaporate more quickly: 55

 

conditions?

 


 

of water

 


 

in a beaker or 55

 


 

of acetone

 


 

in an identical beaker under identical

 


 

ANSWER:

 

water

 

acetone

 


 

Part B

 

Is the vapor pressure of the two substances different?

 

ANSWER:

 

yes

 

no

 


 

Part C

 

This question will be shown after you complete previous question(s).

 


 

Exercise 11.80

 


 

Part A

 

Calculate the amount of heat required to completely sublime 93.0 of solid dry ice

 

carbon dioxide is 32.3

 

.

 


 

at its sublimation temperature. The heat of sublimation for

 


 

ANSWER:

 

https://session.masteringchemistry.com/myct/assignmentPrintView?displayMode=studentView&assignmentID=4212449

 


 

7/13

 


 

4/5/2016

 


 

Week Seven

 


 


 


 


 


 

Exercise 11.70

 


 

Part A

 

Why is the heat of vaporization of water greater at room temperature than it is at its boiling point?

 

ANSWER:

 

Essay answers are limited to about 500 words (3800 characters maximum, including spaces).

 

3785 Character(s) remaining

 

(none provided)

 


 

Exercise 11.72

 

A 90.0

 


 

sample of water is heated to its boiling point.

 


 

Part A

 

How much heat (in

 


 

) is required to vaporize it? (Assume a density of 1.00

 


 

.)

 


 

ANSWER:

 


 


 


 


 


 

Exercise 11.76

 

The vapor pressure of nitrogen at several different temperatures is shown below.

 

Temperature

 


 

Pressure (

 


 

65

 


 

130.5

 


 

70

 


 

289.5

 


 

75

 


 

570.8

 


 

80

 


 

1028

 


 

85

 


 

)

 


 

1718

 


 

Part A

 

Use the data to determine the heat of vaporization of nitrogen.

 

ANSWER:

 

=

 


 


 


 


 


 

Part B

 

Determine the normal boiling point of nitrogen.

 

ANSWER:

 


 

https://session.masteringchemistry.com/myct/assignmentPrintView?displayMode=studentView&assignmentID=4212449

 


 

8/13

 


 

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Week Seven

 


 


 


 

=

 


 

Exercise 11.78

 

Benzene has a heat of vaporization of

 


 

and a normal boiling point of 80.1

 


 

.

 


 

Part A

 

At what temperature does benzene boil when the external pressure is 415

 


 

?

 


 

Express your answer using two significant figures.

 

ANSWER:

 

=

 


 


 


 


 


 

Exercise 11.86

 

Consider the phase diagram for iodine shown below and answer each of the following questions .

 


 

Part A

 

What is the normal boiling point for iodine?

 

Express your answer using four significant figures.

 

ANSWER:

 

=

 


 


 


 


 


 

Part B

 

What is the melting point for iodine at 1

 


 

?

 


 

Express your answer using four significant figures.

 

ANSWER:

 

=

 


 


 


 


 


 

Part C

 

What phase is present at room temperature and normal atmospheric pressure?

 

ANSWER:

 


 

https://session.masteringchemistry.com/myct/assignmentPrintView?displayMode=studentView&assignmentID=4212449

 


 

9/13

 


 

4/5/2016

 


 

Week Seven

 


 

solid

 

liquid

 

gas

 


 

Part D

 

What phase is present at 186

 


 

and 1.0

 


 

?

 


 

ANSWER:

 

solid

 

liquid

 

gas

 


 

Exercise 11.88

 

Argon has a normal boiling point of 87.2 and a melting point (at 1 atm) of 84.1 . Its critical temperature is 150.8 and critical pressure is 48.3

 

has a triple point at 83.7 and 0.68

 

.

 


 

. It

 


 

Part A

 

Sketch the phase diagram to answer whether solid argon or liquid argon has the greater density?

 

ANSWER:

 

solid argon

 

liquid argon

 


 

Exercise 11.90

 

The high?pressure phase diagram of ice is shown at the top of the next column. Notice that, under high pressure, ice can exist in several different solid forms

 

.

 


 

Part A

 

What three forms of ice are present at the triple point marked ?

 

ANSWER:

 


 

https://session.masteringchemistry.com/myct/assignmentPrintView?displayMode=studentView&assignmentID=4212449

 


 

10/13

 


 

4/5/2016

 


 

Week Seven

 


 

Essay answers are limited to about 500 words (3800 characters maximum, including spaces).

 

3785 Character(s) remaining

 

(none provided)

 


 

Part B

 

What is the density of ice II compared to ice I (the familiar form of ice.)

 

ANSWER:

 

Ice II is denser than Ice I.

 

Ice I is denser than Ice II.

 


 

Part C

 

Would ice III sink or float in liquid water?

 

ANSWER:

 

Ice III would sink in liquid water.

 

Ice III would float in liquid water.

 


 

Exercise 11.41

 


 

Part A

 

What are the three basic types of solids and the composite units of each? What types of forces hold each type of solid together?

 

ANSWER:

 

Essay answers are limited to about 500 words (3800 characters maximum, including spaces).

 

3785 Character(s) remaining

 

(none provided)

 


 

Exercise 11.48

 


 

Part A

 

Explain how doping can increase the conductivity of a semiconductor. What is the difference between an n?type semiconductor and a p?type

 

semiconductor?

 

ANSWER:

 


 

https://session.masteringchemistry.com/myct/assignmentPrintView?displayMode=studentView&assignmentID=4212449

 


 

11/13

 


 

4/5/2016

 


 

Week Seven

 


 

Essay answers are limited to about 500 words (3800 characters maximum, including spaces).

 

3785 Character(s) remaining

 

(none provided)

 


 

Exercise 11.98

 

Determine the coordination number for each of the following structures.

 


 

Part A

 

Gold

 


 

ANSWER:

 

Coordination number =

 


 

Part B

 

Ruthenium

 


 

ANSWER:

 

Coordination number =

 


 

Part C

 

Chromium

 


 

https://session.masteringchemistry.com/myct/assignmentPrintView?displayMode=studentView&assignmentID=4212449

 


 

12/13

 


 

4/5/2016

 


 

Week Seven

 


 

ANSWER:

 

Coordination number =

 


 

Exercise 11.102

 

Sodium has a density of 0.968

 


 

and crystallizes with the body?centered cubic unit cell.

 


 

Part A

 

Calculate the radius of a sodium atom.

 

ANSWER:

 

=

 


 


 


 


 


 

Exercise 11.108

 


 

Part A

 

Which of the following solids has the highest melting point?

 

,

 

,

 

,

 

ANSWER:

 


 

Part B

 

This question will be shown after you complete previous question(s).

 


 

Score Summary:

 

Your score on this assignment is 0.0%.

 

You received 0 out of a possible total of 4 points.

 


 

https://session.masteringchemistry.com/myct/assignmentPrintView?displayMode=studentView&assignmentID=4212449

 


 

13/13

 


 

 


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