An ideal gas , obeying kinetic theory of...

An ideal gas , obeying kinetic theory of gases cannot be liquefied, because :-

it solidifies before becoming a liquid

forces acting between its molecules are negligible

its critical temperature is above `0 .^(@)C`

its molecules are relatively small in size.

Text Solution

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The correct Answer is:

A gas can only be liquefied, if some forces of attraction are acting in its molecules. Since an ideal gas is devoid of force of attraction in its molecules, therefore it cannot be liquefied.

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An ideal gas obeying kinetic theory of gases can be liquified if

its tempereature is more than critical temperature `T_(C)`

its pressure is more than critical pressure `P_(C)`

its pressure is more than `P_(C)` at a temperature less than `T_(C)`

it cannot be liquified at any value of P and T

An ideal gas can't be liquefied because

its critical temperature is always above `0^(@)C`

its molecules are relatively smaller in size

it solidifies before becoming a liquid

forces operative between its molecules are negligible.

According to kinetic theory of gases

collisions are always elastic

heavier molecules transfer more momentun to the wall of the container

only a small number of molecules move in straight lines with constant velocities

between collisions, the molecules move in straight lines with constant velocities