31.

32.

33.

D 71620
3

Section D (Essays)

Answer any two questions.
Each question carries 10 marks.

tant pressure.
(a) Derive Gibbs-Helmholtz equation in terms of free energy and enthalpy at cons

1 t to
. ial with respec
(b) What is Chemical potential ? Describe Variation of chemical potentia
temperature.

۱ velocity for carbon
Calculate the most probable velocity, average velocity and root mean square
Monoxide at 298K.

found
cti ‏ست‎ at 300 K was
What is Kirchoff's equation ? The enthalpy of reaction N, + 3H, —— 2NH 5

‎t‏ حوء
‎heat capacities ॐ‏
‎to be ~ 91.97 KJ. What will be the enthalpy of reaction at 323 K ? The molar‏

‎d
‎i 28.46, 28.33 an
constant pressure and 300 K for nitrogen, hydrogen and ammonia are

‎37.08 JK — mol“! respectively.

‎uilibri + rature.
Derive Van’t Hoff equation and show Variation of equilibrium constant with tempe
(2 x 10 = 20 marks)