(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 3? (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?

 

- 1 -

 


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This question was answered on: May 23, 2022

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