A sealed container with negligible coefficient of volumetric expansion contains helium (a monoatomic gas). When it is heated from $300\, K$ to $600\, K,$ the average $K.E.$ of helium atoms is
A
Halved
B
Unchanged
C
Doubled
DIncreased by factor $\sqrt 2 $
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C
Doubled
c
Kinetic energy $\propto$ temperature,
so if the temperature is doubled, its kinetic energy will also be doubled.
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