Question

Two different gases ‘A’ and ‘B’ are filled in separate containers of equal capacity under the same conditions of temperature and pressure. On increasing the pressure slightly the gas ‘A’ liquefies but gas B does not liquify even on applying high pressure until it is cooled. Explain this phenomenon.

Answer 1

Liquefaction is a process of conversion of gaseous molecules into a “liquid state”.

This “change” is the result of changes in temperature, pressure, and volume in physical conditions of a total reaction.

The “temperature” at which a gas turns into a liquid is the “critical temperature”. The pressure needed to “liquefy a gas” also increases with the increase in temperature.

Gas 'A' is at a critical temperature and liquefies.

Gas 'B' is higher than “critical temperature” at a temperature and therefore, does not liquefy even when high pressure is applied.

Answer 2

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