Time : Three Hours

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SPAR a ಓ ಬ YL

THIRD SEMESTER B.A/B.Sc. DEGREE EXAMINATION
NOVEMBER 2019

(CUCBCSS—UG)
Chemistry ५
CHE 3B 03—PHYSICAL CHEMISTRY—I
Maximum : 60 Marks
Section A (One Word)
Answer all questions.
Each question carries 1 marks
Write Vander waals equation for n moles of a real gas and explain terms.

At critical temperature V— Vc =
Write an example of intensive property.

For a cyclic process AE =
Efficiency of a Carnot engine working between temperature T, and T, is

The unit of surface tension is

Molar refraction Ry =

At ———-ry= ry.
The relation between Kp and Kx is
Entropy is a measure of ‏ب ب ب‎ of the system. ,

(10 x 1 = 10 marks)

Section B (Short Answers)

Answer an ten questions.
Each question carries 2 marks.

Define collision number and collision frequency.

Calculate RMS velocity of O, at 25°C.
Explain why internal energy is a state function while work not.

Define ensemble.