Physical Chemistry Sample Final 5 PDF

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Sample (practice) final exam multiple choice questions...

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5/8/2019

Final: 01-Sp19-Physical Chemistry II

Final Due May 11 at 11:59pm Points 120 Questions 12 Available May 7 at 12am - May 11 at 11:59pm 5 days Time Limit 240 Minutes

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Attempt

Time

Score

Attempt 1

63 minutes

100 out of 120

Score for this quiz: 100 out of 120 Submitted May 8 at 9:38pm This attempt took 63 minutes.

Question 1

0 / 10 pts

Gaseous argon of the mass 50.0 g is placed inside the thermally isolated container under pressure 1.00 atm at room temperature of 300.0 K. The pressure is slowly changed in such a manner that the gas temperature reduces twice? What is the final pressure? Express in Pascals.

You Answered

orrect Answers

50662.5

17912.0 (with margin: 50.0)

Question 2

0 / 10 pts

Thermally isolated ideal monatomic gas with electronic spin of molecules S=1 is in a saturating magnetic field so big that all spins are in the ground state. Then this field was slowly turned off while the gas volume remains unchangeable. What would be the ratio of the final and initial temperatures of the gas? Treat its translational, vibrational and rotational degrees of freedom classically. https://tulane.instructure.com/courses/2184490/quizzes/4036452

1/6

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You Answered

orrect Answers

Final: 01-Sp19-Physical Chemistry II

0.6

0.4807 (with margin: 0.01)

Question 3

10 / 10 pts

What is the molar entropy of argon at temperature T=300.0 K and atmospheric pressure. Assume that Ar has a nuclear spin S=0 and molar mass M=39.9480 g.

Correct!

orrect Answers

154.8647

154.8647 (with margin: 2.0)

Question 4

10 / 10 pts

Find the molar rotational heat capacity of molecular hydrogen at temperature T=30.0K? The rotational parameter of hydrogen is given by B=60.8 cm-1 . Correct!

orrect Answers

7.097

7.085 (with margin: 0.8)

Question 5

10 / 10 pts

The oxygen molecules possess the electronic spin S=1. The magnetic moment of oxygen molecule is −1.8568 10-23 J/T (the interaction of the magnetic field with the magnetic moment takes the form https://tulane.instructure.com/courses/2184490/quizzes/4036452

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Final: 01-Sp19-Physical Chemistry II

(https://en.wikipedia.org/wiki/Tesla_(unit)) ). What is the maximum molar

specific heat of oxygen spins in a magnetic field of 7 T. Correct!

orrect Answers

5.298

5.298 (with margin: 0.06)

Question 6

10 / 10 pts

The frequency of O2 molecule vibrational mode is 1641 cm-1 ? What is the vibrational molar entropy of gaseous oxygen at 100.000 degrees Celsius?

Correct!

orrect Answers

0.109

0.1091 (with margin: 0.002)

Question 7

10 / 10 pts

Find the partial derivative

Correct!

S/V

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Final: 01-Sp19-Physical Chemistry II

Question 8

10 / 10 pts

What is the root mean squared fluctuation of monatomic ideal gas volume if it has N molecules?

Correct!

Question 9

10 / 10 pts

Find the partial derivative

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Correct!

Final: 01-Sp19-Physical Chemistry II

-V/T

Question 10

For the given partial derivative

10 / 10 pts

find the one equal to this one

Correct!

Question 11

10 / 10 pts

What is classical molar specific heat of gaseous CO2 at constant volume? https://tulane.instructure.com/courses/2184490/quizzes/4036452

5/6

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Correct!

Final: 01-Sp19-Physical Chemistry II

13R/2

Question 12

10 / 10 pts

At low temperatures an internal energy of two dimensional dielectrics at fixed pressure or volume depends on the temperature as U = U0 + AT3 due to the contribution of vibrations. What is the heat capacity of dielectrics in this temperature range?

Correct!

3AT2

Quiz Score: 100 out of 120

https://tulane.instructure.com/courses/2184490/quizzes/4036452

6/6...