Kelvin

Definition

Kelvin is the SI base unit for temperature, symbolized as K. It measures absolute temperature starting from absolute zero.

5 Must Know Facts For Your Next Test

1. Zero Kelvin (0 K) is known as absolute zero, the point where all molecular motion ceases.
2. The Kelvin scale does not use degrees; it is simply 'Kelvin'.
3. The freezing point of water on the Kelvin scale is 273.15 K.
4. To convert Celsius to Kelvin, add 273.15 to the Celsius temperature.
5. The Kelvin scale is essential for scientific calculations involving thermodynamics and kinetic theory.

Review Questions

• What is the significance of 0 K in the Kelvin scale?
• How do you convert a temperature from Celsius to Kelvin?
• Why is the Kelvin scale preferred in scientific contexts over Celsius or Fahrenheit?

Related terms

Absolute Zero:

The lowest possible temperature, 0 K, where molecular motion theoretically stops.

Thermodynamics: The branch of physics that deals with heat, work, and forms of energy.

Kinetic Theory:

A theory that explains the macroscopic properties of gases by considering their molecular composition and motion.