Absolute zero is the temperature at which the particles of
matter (molecules and atoms) are at their lowest energy points.
Absolute zero is the lower limit
of the thermodynamic temperature scale.
It is a state at which the
enthalpy and entropy of a cooled ideal gas reaches its minimum value.
In kelvin and Rankine temperature scales, absolute zero is 0 kelvin (K) or
0 degrees Rankine (°R).
In The Celsius and Fahrenheit scales, absolute zero is −273.15 °C or
−459.67 °F.