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Free energy of mixing in non-isothermal free expansion(MC) (redirected from Free energy of mixing in non-isothermal free expansion (MC))

Page history last edited by Joe Redish 7 years, 2 months ago

7.3.3.P9a

 

Assume we have one mole each of two different weakly-interacting gases in identical thermally-insulated glass balls on either side of a valve as shown in the top figure at the right. The gas on the left is at a temperature of 300 K, while the gas on the right is at a temperature of 400 K. 

 

1. Before the valve is opened, which side has greater pressure? 

A. Left side

B. Right side

C. Both sides are the same

D. There is not enough information to decide.

 

 

2. Before the valve is opened, which side has greater internal energy? 

A. Left side

B. Right side

C. Both sides are the same

D. There is not enough information to decide.

 

3. Before the valve is opened, which side has greater entropy? 

A. Left side

B. Right side

C. Both sides are the same

D. There is not enough information to decide.

 

4. When the valve is opened, what happens to the entropy of the system? 

A. It increases

B. It decreases

C. It stays constant

D. There is not enough information to decide. 

 

5. When the valve is opened, what happens to the free energy of the system? 

A. It increases

B. It decreases

C. It stays constant

D. There is not enough information to decide.

 

 

Ben Dreyfus 3/3/16 

 

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