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What is relative temperature?
Celsius and Fahrenheit are relative (standardized using the melting and boiling point of water) temperature scales. Kelvin is an absolute, thermodinamic based, temperature scale.
Why you use kelivin in calculation instead of celsius and Fahrenheit?
Kelvin has the advantage that it is an absolute temperature scale - it starts from absolute zero. This simplifies several calculations; for example, in an ideal gas, at constant pressure, the volume of the gas is proportional to the absolute temperature. Similarly, calculations related to heat machines are simpler if an absolute temperature scale is used.
What is absulte 0?
"Absolute Zero" refers to zero on the kelvin scale for temperature. Absolute Zero, or 0 kelvin ( = -459.67 degrees Fahrenheit = -273.15 degrees Celsius), is the coldest possible temperature. It is probably impossible to achieve this temperature, but you can get very close.
What is unique about the kelvin temperature scale?
It is an absolute measurement scale of temperature. 0K is absolute zero there are no negative units on the scale (degrees centigrade [celsius] + 273 = degrees Kelvin). This also is the case on the Rankine temperature scale (degrees fahrenheit +459.69 = degrees Rankine)
What is the unit used when measuring temperature?
There are four units for temperature: Celsius, Kelvin, Fahrenheit, and Rankine. The Kelvin scale is the same as the Celsius scale, just with the zero point being absolute zero. The Rankine scale is the same thing for the Fahrenheit scale. ■
