CHEM 101 Graded Exam 4: Topic 11 modern materials_straighterline

4/14/22, 11:53 PM Graded Exam 4

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CHEM101_MH_V4 | Topic 11: Modern Materials


Started on Saturday, April 2, 2022, 12:49 AM
State Finished
Completed on Saturday, April 2, 2022, 2:11 AM
Time taken 1 hour 21 mins
Grade 115.00 out of 115.00 (100%)




Question 1
Naphthalene sublimes at room temperature and 1 atmosphere pressure; which statement is true
Correct
concerning the triple point of naphthalene?
4.60 points out
of 4.60
Select one:
a. The triple point is lower than room temperature.
b. The triple point is higher than room temperature.
c. The triple point is equal to room temperature.




Question 2
Which of the following pure substances has the highest boiling point?
Correct

4.60 points out
Select one:
of 4.60
a. CH4
b. Cl2
c. Kr
d. CH3Cl
e. N2




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, 4/14/22, 11:53 PM Graded Exam 4

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Question 3
Use the following data to determine the molar heat of vaporization of chlorine gas.
Correct
(R = 8.314 J/K • mol)
4.60 points out T (°C) –84.5 –71.2 –47.3
of 4.60 P
40.0 100.0 400.0
(mmHg)

Select one:
a. 34.7 kJ/mol
b. 21.9 kJ/mol
c. 3.45 kJ/mol
d. 712 J/mol
e. 9.99 kJ/mol




Question 4
At a temperature of 27 K, neon condenses due to
Correct

4.60 points out
Select one:
of 4.60
a. dipole-dipole forces.
b. London dispersion forces.
c. hydrogen bonding.
d. covalent bonding.
e. intramolecular forces.




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