Physics A-Level
Kelvin scale
What Kelvin scale means in Physics A-Level, as defined for AQA, OCR.
Definitions of Kelvin scale
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Reference: AQA
An absolute thermodynamic temperature scale, and temperatures in kelvin are used in the ideal gas equation because T is directly proportional to the average kinetic energy of particles.
Celsius temperatures are converted to kelvin by adding 273, and the graph of pressure against temperature in kelvin is a straight line.
Topics that use Kelvin scale
- Ideal gases (A-level only) (AQA A-Level)
- Ideal gases (OCR A-Level)
Related terms
- Absolute zero
- Avogadro constant
- Boltzmann constant
- Gas laws
- Molar gas constant
- Assumptions of ideal-gas behaviour
- Assumptions of kinetic theory
- Boyle's law
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