Home Physics Kinetic Theory of Gases Specific Heat and Heat Capacity A cubical box of side 1 metre contains heliu…
Physics Kinetic Theory of Gases Specific Heat and Heat Capacity MCQ (Single Correct)

A cubical box of side 1 metre contains helium gas (atomic weight 4) at a pressure of 100 Nm –2 . During an observation time of 1 second, an atom traveling with the root-mean-square speed parallel to one of the edges of the cube was found to make 500 hits with a particular wall, without any collision with other atoms. Take R = 25/3J/mol-K and k = 1.38×10 –23 JK –1

A
Evaluate the temperature of the gas.
B
Evaluate the average kinetic energy per atom.
C
Evaluate the total mass of helium gas in the box.

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Ans. 160 K 3.312 × 10 –21 J 3 × 10 –4 kg

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