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NC Chemistry Project (Homework)

James Finch

Chemistry - HS, section 1st period, Fall 2019

Instructor: Dr. Friendly

Current Score : 19 / 19

Due : Wednesday, October 23, 2019 18:00 EDT

Last Saved : n/a Saving...  ()

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Question
Points
1 2 3 4 5 6 7 8 9
–/1 –/1 –/1 –/1 –/1 –/1 –/11 –/1 –/1
Total
19/19 (100.0%)

Assignment Submission

For this assignment, you submit answers by question parts. The number of submissions remaining for each question part only changes if you submit or change the answer.

Assignment Scoring

Your last submission is used for your score.

1. –/1 points ncchem 3.1.006. My Notes
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What effect does lowering the pressure on the surface of water have on the boiling point?
    
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2. –/1 points ncchem 3.1.015. My Notes
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–/1
 
How does the average speed of gas molecules change as the molar mass of the gas increases?
    
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3. –/1 points ncchem 3.1.018. My Notes
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In a closed container, what happens to the vapor pressure inside the container if more liquid is added to the container at constant temperature? Assume there was enough liquid initially present to establish equilibrium.
    
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4. –/1 points ncchem 3.1.022. My Notes
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Which of the following represents the highest potential energy state?
    
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5. –/1 points ncchem 3.1.024. My Notes
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Which of the following represents the lowest potential energy state?
    
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6. –/1 points ncchem 3.1.028. My Notes
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Iron has a specific heat of 0.450 J/g·°C. How much energy is required to raise the temperature of 295 g of iron from 12.0°C to 153.0°C?
WebAssign will check your answer for the correct number of significant figures.(No Response) kJ
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7. –/11 points ncchem 3.1.050. My Notes
Question Part
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1 2 3 4 5 6 7 8 9 10 11
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–/11
 
The phase diagram for carbon dioxide is shown below.

(1) Type your answer for physical states using the format of g for gas, l for liquid, and s for solid. If more than one physical state is present, enter the physical states separated by a comma.
(2) Type your answer for trends using the format of increase, decrease, remains constant.
(3) Type your answer for changes in physical state, for example solid to liquid to gas, using the format s>l>g.
(a) What physical state(s) is/are present at 50°C and 100 atm?
(No Response)
(b) What physical state(s) is/are present at -78°C and 1 atm?
(No Response)
(c) What physical state(s) is/are present at -90°C and 10 atm?
(No Response)
(d) What physical state(s) is/are present at 25°C and 73 atm?
(No Response)
(e) What physical state(s) is/are present at the triple point?
(No Response)
(f) How does the melting point change with increasing pressure?
(No Response)
(g) How does the boiling point change with increasing pressure?
(No Response)
(h) What change(s) in physical state occur if carbon dioxide at 10°C and 1 atm is cooled to -90°C and 1 atm?
(No Response)
(i) What change(s) in physical state occur if carbon dioxide at -60°C and 5.2 atm is changed to -60°C and 0.1 atm?
(No Response)
(j) What change(s) in physical state occur if carbon dioxide at 50°C and 73 atm is cooled to -78°C and 73 atm?
(No Response)
(k) What change(s) in physical state occur if carbon dioxide at 25°C and 5.2 atm is pressurized to 25°C and 70 atm?
(No Response)
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8. –/1 points ncchem 3.1.051. My Notes
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Which of the following increase the vapor pressure of a liquid? (Select all that apply.)

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9. –/1 points ncchem 3.1.054. My Notes
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Some physical properties of water are shown below.

melting point0.0°C
boiling point100.0°C
specific heat solid 2.05 J/g·°C
specfic heat liquid4.184 J/g·°C
specific heat gas2.02 J/g·°C
ΔH° fusion6.02 kJ/mol
ΔH° vaporization40.7 kJ/mol

How much energy is released when 14.3 g of gaseous water at 100.0°C is converted to solid water (ice) at 0.0°C?
WebAssign will check your answer for the correct number of significant figures.(No Response) kJ
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