Can you do number 3? (pchem )110C
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
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.
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
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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This question was answered on: May 23, 2022
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