Absolute zero
What Absolute zero means in Physics A-Level, as defined for AQA, OCR.
Definitions of Absolute zero
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Reference: OCR
The temperature at which pressure would be zero for an ideal gas, found as the intercept on the T-axis when the line is extrapolated to p = 0 (0 K or −273 °C).
The lowest possible temperature, at which a system has minimum internal energy, defined as 0 K, equivalent to −273.15 °C.
0 K, the lowest limit for temperature, at which a substance has minimum internal energy.
The value 0 K, which defines the kelvin scale.
Topics that use Absolute zero
- Ideal gases (A-level only) (AQA A-Level)
- Ideal gases (OCR A-Level)
- Solid, liquid and gas (OCR A-Level)
- Temperature (OCR A-Level)
Related terms
- Avogadro constant
- Boltzmann constant
- Gas laws
- Kelvin scale
- Molar gas constant
- Assumptions of ideal-gas behaviour
- Assumptions of kinetic theory
- Boyle's law
Using Absolute zero in the exam
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