"Absolute zero is the lower limit of the thermodynamic temperature scale, a state at which the enthalpy and entropy of a cooled ideal gas reaches its minimum value, taken as 0. The theoretical temperature is determined by extrapolating the ideal gas law; by international agreement, absolute zero is taken as \u2212273.15\u00B0 on the Celsius scale (International System of Units), which equates to \u2212459.67\u00B0 on the Fahrenheit scale (United States customary units)."@en . . .