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AP EAMCET202022 Sep 2020Evening ShiftPhysicsKinetic Theory of GasesActual

The molecular motion ceases at

Options

  1. A273 ~K
  2. B273^ C
  3. C-273 ~K
  4. D-273^ C

Correct answer

D. -273^ C

Step-by-step solution

According to kinetic theory of gases, average kinetic energy of gas molecules is K= 3 2 R T i.e. K T We know that, kinetic energy may not be negative. Its minimum value may be equal to zero. Hence, minimum possible temperature on the earth is equal to 0 ~K at which molecular motion starts ceasing. Minimum possible temperature =0 ~K =(0-273)^ C =-273^ C

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