According to kinetic theory:
Correct answer: D. The mean translational K.E. of the molecule is directly proportional to the absolute temperature
- A. The pressure exerted by a gas is proportional to mean square velocity of the molecules
- B. The pressure exerted by the gas is proportional to the root mean square velocity of the molecules
- C. The root mean square velocity is inversely proportional to the temperature
- D. The mean translational K.E. of the molecule is directly proportional to the absolute temperature
Explanation
"The equation KE=(3RT)/(2Nٖₐ) gives a new definition of temperature according to which the kelvin temperature of a gas is directly proportional to the average translational kinetic energy of its molecules." (PTB)
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About Thermal Equilibrium and Heat
Thermal equilibrium means that bodies in contact have the same temperature and no net heat flows between them. The topic distinguishes heat from temperature, uses the zeroth law of thermodynamics, and covers heat transfer, specific heat capacity, thermal expansion and the conditions for reaching equilibrium.
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