Difference between revisions of "Absolute Temperature"
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===About Absolute Temperature=== | ===About Absolute Temperature=== | ||
| − | + | *[[Absolute Temperature|Absolute temperature]] uses the [[Kelvin]] scale, where 0 [[Kelvin|K]] represents [[Absolute Zero|absolute zero]]. | |
| + | *[[Absolute Zero|Absolute zero]] is the point where a [[system]] has minimum [[Internal Energy|internal energy]]. | ||
| + | *The [[Kelvin]] scale is an absolute thermodynamic [[temperature]] scale. | ||
| + | *[[Absolute Temperature|Absolute temperature]] differs from [[Degrees Celsius|Celsius]] and [[Fahrenheit]] scales in that it starts at [[Absolute Zero|absolute zero]]. | ||
| + | *[[Absolute Temperature|Absolute temperature]] is crucial for calculations in thermodynamics and statistical mechanics. | ||
| + | *At [[Absolute Zero|absolute zero]], entropy of a perfect crystal is zero according to the third law of thermodynamics. | ||
| + | *[[Kelvin]] is defined based on the [[Triple Point|triple point]] of [[water]] (the temperature and pressure at which [[water]] can exist as a [[solid]], [[liquid]] or a [[gas]]) simultaneously, precisely 1/273.16 of the thermodynamic [[temperature]] of the [[Triple Point|triple point]] of [[water]]. | ||
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===Examples=== | ===Examples=== | ||
| − | + | *The [[temperature]] of [[liquid]] nitrogen is 77 [[Kelvin|K]]. | |
| − | The [[temperature]] of [[liquid]] nitrogen is 77 [[Kelvin|K]]. | + | *Room [[temperature]] is approximately 293 [[Kelvin|K]] on the [[Kelvin]] scale. |
| − | Room [[temperature]] is approximately 293 [[Kelvin|K]] on the [[Kelvin]] scale. | ||
Latest revision as of 10:11, 19 May 2024
Key Stage 5
Meaning
Absolute temperature is the measure of temperature starting from absolute zero, typically measured in Kelvin (K).
About Absolute Temperature
- Absolute temperature uses the Kelvin scale, where 0 K represents absolute zero.
- Absolute zero is the point where a system has minimum internal energy.
- The Kelvin scale is an absolute thermodynamic temperature scale.
- Absolute temperature differs from Celsius and Fahrenheit scales in that it starts at absolute zero.
- Absolute temperature is crucial for calculations in thermodynamics and statistical mechanics.
- At absolute zero, entropy of a perfect crystal is zero according to the third law of thermodynamics.
- Kelvin is defined based on the triple point of water (the temperature and pressure at which water can exist as a solid, liquid or a gas) simultaneously, precisely 1/273.16 of the thermodynamic temperature of the triple point of water.
Examples
- The temperature of liquid nitrogen is 77 K.
- Room temperature is approximately 293 K on the Kelvin scale.