Thermodynamic temperature is a measure of the average kinetic energy of the particles in a substance. It is a fundamental concept in thermodynamics, which studies heat and energy transfer. The standard unit of thermodynamic temperature is the kelvin, where 0 K represents absolute zero, the point at which particle motion theoretically ceases. This temperature scale is essential for understanding various physical processes and laws, such as the ideal gas law. Unlike other temperature scales, like Celsius or Fahrenheit, thermodynamic temperature is based on absolute values, making it crucial for scientific calculations and experiments.