Statistical thermodynamics

1.An ideal gas is composed of particles of mass M in thermal equilibrium at a temperature T in one container. Another container contains ideal gas particles of mass 2M at a temperature 2T. The correct statement about the two gases is:

 (1) average kinetic energy and average speed will be same in the two cases.

(2) both the averages will be doubled in the second case.

(3) only the average kinetic energy will be doubled in the second case.

(4) only the average speed will be doubled in the second case.

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