## Negative Temperature

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

Chris Dis3L
Posts: 45
Joined: Fri Sep 28, 2018 12:25 am

### Negative Temperature

Systems with a positive temperature will increase in entropy as one adds energy to the system, while systems with a negative temperature will decrease in entropy as one adds energy to the system. Do negative temperature systems violate the 2nd Law of Thermodynamics?

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Joined: Fri Sep 29, 2017 7:04 am

### Re: Negative Temperature

Posts: 35
Joined: Fri Sep 28, 2018 12:19 am

### Re: Negative Temperature

I am not sure there exists such a thing as a negative temperature system because basically all movement stops at 0 K.

Ibrahim Malik 1H
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Joined: Fri Sep 28, 2018 12:27 am
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### Re: Negative Temperature

When you are thinking of negative temperatures, you are most likely referring to a negative Celsius. However, when we look at temperature we must convert to Kelvin, and there can never truly be a negative temperature when referring to the temperature in Kelvin as 0 degrees K is the lowest possible temperature. So although a problem may take place at -100 degrees C, in Kelvin this problem takes place at 173 degrees Kelvin.

Sara Flynn 2C
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Joined: Fri Sep 28, 2018 12:23 am

### Re: Negative Temperature

since the temperature is in kelvin and there is no such thing as negative kelvin whether or not the second value is positive or negative is dependent upon the entropy of the system

Jonny Schindler 1A
Posts: 30
Joined: Fri Sep 28, 2018 12:20 am

### Re: Negative Temperature

A positive entropy will always make a reaction more favorable. The temperature can only change by how much.