The Absolute Scale of Temperature, also known as the Kelvin scale, is a thermodynamic temperature scale where absolute zero is zero kelvins (0 K). Absolute zero is the point at which all thermal motion ceases in the classical description of thermodynamics.
The Kelvin scale is directly related to the Celsius scale. The conversion between the two is straightforward: K = °C + 273.15. This means that 0 K corresponds to -273.15°C, and the size of one unit (degree) is the same on both scales.
Absolute zero is the theoretical temperature at which a system's entropy would reach its minimum value. It is significant because it represents the lower limit of the thermodynamic temperature scale, where molecular motion is minimal, and it serves as a reference point for the Kelvin scale.
The Kelvin scale was developed to provide a more accurate and scientific approach to temperature measurement. It is based on absolute zero and the properties of gases, making it essential for scientific calculations, especially in physics and engineering. It allows for a more consistent and universal understanding of temperature.
The Kelvin scale is widely used in scientific research because it provides a precise and absolute measure of temperature. It is crucial in fields such as thermodynamics, quantum mechanics, and cosmology. The Kelvin scale is used to describe the thermal properties of materials, the behavior of gases, and the radiation of black bodies, among other phenomena.