• Kinetic energy is the energy of motion.
  • When a substance is heated, some of the absorbed energy is stored within the particles.
  • This is registered as an increase in the temperature of the substance.
  • At any given temperature, not all of the particles of a sample of matter have the same kinetic energy.
  • For example, hydrogen gas at 200 K has twice the average kinetic energy as the particles in a hydrogen sample at 100 K. Absolute zero is the temperature at which the motion of particles theoretically ceases.
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