Q:

The thermodynamic temperature scale has an ‘absolute zero’ at −273 °C. In what sense is the zero is absolute?

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The thermodynamic temperature scale has an ‘absolute zero’ at −273 °C. In what sense is the zero is absolute?


  1. it is 0 kelvin.
  2. it is exactly 0.00000000… etc.
  3. particle motion has ceased at this temperature.
  4. it is impossible to reach this temperature.

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C: As temperature is a measure of the kinetic energy of particles, when all particle motion has stopped, temperature is at its lowest point and cannot decrease further. 

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