- #1
Mk
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What is absolute temperature? The aboslute value of a temperture value?
Mk said:I think its the first one, though it could go either way.
Clausius2 said:[tex] T=\frac{\partial U}{\partial S}\Big)_{V} [/tex]
Now is when a physicist should tell us if this derivative can be negative or not. I don't really know.
marlon said:Yes it can be...But then again that is very exotic. For example in some spin-systems (i mean many atoms and we only look at spin spin interactions) absolute NEGATIVE temperatures can arise. These temperatures are no really negative, but they need to be looked at as bigger then infinity...
The conditions for this to occur are for example that the spin-spin relaxation time is little compared to the spin lattice relaxation time. This means that the spins mutually interact long before thermal degrees of freedom come into play...
regards
marlon
Absolute temperature, also known as thermodynamic temperature, is a measurement of the average kinetic energy of the particles in a substance. It is measured in Kelvin (K) and is based on the theoretical concept of absolute zero, the point at which all molecular motion stops.
Absolute temperature is different from other temperature scales, such as Celsius and Fahrenheit, because it does not use arbitrary reference points. Instead, it is based on the fundamental properties of matter and can never be negative.
To convert between absolute temperature and other temperature scales, you can use the following equations:
Absolute temperature is used in scientific research to accurately measure and compare the thermal energy of different substances. It is also a fundamental component in various thermodynamic equations used to analyze and predict the behavior of gases and other materials.
According to the Ideal Gas Law, there is a direct relationship between absolute temperature and pressure. As absolute temperature increases, pressure also increases, assuming all other variables remain constant. This relationship is important in understanding the behavior of gases under different conditions.