## Midterm

Volume: $\Delta S = nR\ln \frac{V_{2}}{V_{1}}$
Temperature: $\Delta S = nC\ln \frac{T_{2}}{T_{1}}$

Lily Benitez 2G
Posts: 63
Joined: Fri Sep 28, 2018 12:29 am

### Midterm

Nanotechnologists have found ways to create and manipulate structures containing only a few molecules. However, orienting the molecules in specific ways to assemble such structures can be difficult. Calculate the entropy of a solid nano structure made of 64 molecules in which the molecules (i) are all aligned in the same direction; (ii) lie in any one of four orientations with the same energy.

How do we find Kb for part two?

Alana Sur 3B
Posts: 61
Joined: Fri Sep 28, 2018 12:25 am

### Re: Midterm

Kb is boltzmann's constant, which is given in the equation sheet.
for part two, we calculate :
w = orientations ^ # of molecules.
delta S = Kb x w
delta S = (1.38x 10^-23) (4^64)

Celio_G_Dis2C
Posts: 33
Joined: Fri Jan 11, 2019 12:16 am

### Re: Midterm

Kb is given already, it should be on the constant sheet

sharonvivianv
Posts: 63
Joined: Fri Apr 06, 2018 11:05 am

### Re: Midterm

Don't forget to check midterm solutions on the course website!

Lily Benitez 2G
Posts: 63
Joined: Fri Sep 28, 2018 12:29 am

### Re: Midterm

Thank You! Just saw it