Physical Chemistry

 Physical Biochemistry Essay

CH213. Physical Biochemistry and biology II. Last Exam

Name: Your Scholar Number:

110 Normal Factors + 10 Bonus Points If you obtain 110 points out of 120 points, you will definately get the full 40% assigned towards the midterm test.

Your ratings 1) 2) 3) 4) 5) 6) Total: away of twenty-five out of 20 away of 20 out of 15 away of 20 out of 20 out of 120

* Every one of the problems are linked. In other words, to resolve the problem, you might need the information and answers given in other problems. All required information is simply given. As well please talk to the extra material passed out to you.

1) (25 pts) a) (6 pts) The translational strength states within a cubic box are given by following equation.

Derive this equation intended for the molecular translational rupture function.

You will require the following crucial relation.

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zero

e

пЂ­пЃЎn 2

пѓ¦ пЃ° пѓ¶ dn пЂЅ пѓ§ пѓ§ 4пЃЎ пѓ· пѓ· пѓЁ пѓё

1/ 2

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( a^3 =V

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b) (3 pts) If the vibrational energy level are given as follows, (b-1) wherever is the no of vibrational energy? (b-2) What approximation has been manufactured regarding the vibrational motion?

Answers) (b-1) The zero of vibrational strength is at the bottom of the internuclear potential well. (2 pts) (b-2) The vibrational movement is approximated as an harmonic oscillator. (1 pt)

c) (6 pts) Get the following equation for the molecular vibrational partition function.

You will need the relation relevant when by is less than 1 )

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you 1пЂ­ back button

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d) (2 pts) In the event the molecular electronic partition function can be approximated as follows, wherever is the absolutely no of electric energy?

Answers) The no of the electronic energy is taken to become the segregated atoms at rest in their digital states (2 pts).

e) (3 pts) If the molecular rotational partition function is given by the next equation, what assumptions have been completely made?

Answers) 1) The molecule is approximated to become rigid-rotor. (1 pt) 2) The temperatures is much more than the rotating temperature. (2 pts)

f) (5 pts, no incomplete points) Depending on the answers and details given previously mentioned, write down the equation intended for the molecular partition function of a diatomic molecule.

Answers) ( Simply no partial details. ) ( )

2) (20 pts) a) (3 pts, not any partial points) For a diatomic ideal gas, write down the partnership between the rupture function (Q) and the molecular partition function (q).

Answers) 3pts. Simply no partial details. ( )

(

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b) (7 pts) Obtain the following formula.

Answer) ∑ ( ) ( )( ) ∑ ( ( )

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(3 pts) (4 pts) )( ( ) ( ) (7 pts) )

( ( ( ) ) ( )

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c) (5 pts) A is given as follows.

Express T in terms of Queen.

Answers)

Path1 (1 pt) (2 pts) ( ( ) ( 5 pts) )

Path2 ( ) ∏ ( ) ∑

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∑

(2 pts) ∑ ∑

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∑ ∑ ∑ ∑ ∑ ⁄ ∑ (4 pts)

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(5 pts)

d) (5 pts) Express S when it comes to q. Make use of Stirling's approximation (ln N! = N ln D – N).

Answers) ( )

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(5 pts)

3) (20 pts) a) (10 pts) Determine the standard large molar entropy of Br2(g) in 298. 15 K. (10 pts in case the value and unit is proper. 3 pts deduction if the value is wrong nevertheless within 20 percent of the right answer. several pts deductions whenever the unit is not created or inappropriate. 7 pts deduction in the event the value can be wrong and out of doors 20 percent of the correct answer. ) Answers) For ( ) ( ) (3 pts)

Then simply,

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10 pts if the worth and unit is correct. three or more pts deductions if the worth is wrong but within just 20 percent in the correct answer. 3 pts deduction when the unit is not really...


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