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A mole of two-state systems each has energy difference 2.346 × 10-21 J. 1) At what...

A mole of two-state systems each has energy difference 2.346 × 10-21 J.

1)

At what temperature are 90% of the two-state parts in their low-energy states?

T90%=

K

2)

What is the heat capacity at T= 17 K?

CV=

J/K  

3)

What is the heat capacity at T= 85 K?

CV=

J/K

4)

What is the heat capacity at T= 170 K?

CV=

J/K

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