What is the temperature in Celsius that represents absolute zero?

Absolute zero is defined as the theoretical lowest temperature possible, where the motion of atoms theoretically comes to a complete stop. In the Celsius scale, absolute zero is specifically set at -273.15 degrees Celsius. This temperature is significant in thermodynamics, as it serves as the reference point for measuring temperature on the Kelvin scale, where absolute zero is 0 K.

The Celsius temperature scale is based on properties of water, but it is crucial to understand that absolute zero is defined by this specific figure, making -273.15 degrees Celsius the universally accepted point of absolute zero. This distinction is foundational in physics, as it marks the limit of cooling and a significant aspect of the laws of thermodynamics.