What is the term for the lowest temperature at which the motion of particles that constitutes heat would be minimal?

The lowest temperature at which the motion of particles that constitutes heat is minimal is known as Absolute Zero. At this temperature, which is defined as 0 Kelvin (or -273.15 degrees Celsius), thermal energy is at its lowest possible state, and particles are virtually motionless. This concept is fundamental in thermodynamics and signifies a point where entropy reaches its minimum value.

Understanding Absolute Zero is critical in various scientific fields, including physics and chemistry, as it serves as a reference point for the Kelvin scale and explains behaviors of gases, crystals, and the principles behind superconductivity. At temperatures approaching Absolute Zero, unique phenomena occur, such as Bose-Einstein condensation, where particles behave collectively as a single quantum entity.