  (Solution) 110C Stuchebrukhov Final Problems Final 2003 1) Calculate The Residual Entropy Of N=10^5 Hydrogen Atoms That Can Occupy M=10^7 Sites On The Surface | Snapessays.com

(Solution) 110C Stuchebrukhov Final Problems Final 2003 1) Calculate the residual entropy of N=10^5 hydrogen atoms that can occupy M=10^7 sites on the surface

Can you do number 5?(pchem )110C

Stuchebrukhov

Final Problems

Final 2003

1) Calculate the residual entropy of N=10^5 hydrogen atoms that can occupy M=10^7

sites on the surface of Ti at T=0.

At which N the entropy is maximum?

2) One mole of an ideal mono-atomic gas at room temperature and pressure P1= 1atm is

subjected to pressure jump fromP1= 1atm to P2=2 atm. Calculate the final temperature of

the gas when the system equilibrates. Assume the system is

isolated

form the

environment.

Same as above, only in a slow, reversible process of pressure increase

from P1 to P2.

2) Estimate the change of freezing temperature of water, when the pressure is increased

to 2 atm.

V

s

?

V

l

=

1.63 cm

3

/mol

?

H

ls

=

6.01 kJ/mol

4) Estimate the number of molecules of air that collide with a wall area of 100 A^2, per

second, whose kinetic energy is greater than 5kT. Assume pressure 1 atm, and room

temperature.

5) It is believed that smell propagates through air via diffusion of aromatic molecules.

a)Estimate the diffusion coefficient of gas molecules with molar mass 200g/mol and

radius of interaction with air molecules of 5 Angstroms. Assume room temperature. (In

class we discussed diffusion in liquids. Here you need to figure out the diffusion

coefficient in gas!)

b)How much time will it take for such a molecule to diffuse a distance of 1m?

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