Q.

A sealed container with a negligible linear coefficient of thermal expansion contains Helium. When heated from 300 K to 600 K, the average kinetic energy of Helium atom is

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a

halved

b

increased by a factor of 2

c

left unchanged

d

doubled

answer is C.

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Detailed Solution

The average kinetic energy per molecule of a gas is 32kT  α   T

If temperature is doubled then  average kinetic energy also doubles

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A sealed container with a negligible linear coefficient of thermal expansion contains Helium. When heated from 300 K to 600 K, the average kinetic energy of Helium atom is