Q. 24

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 liquefy even on applying high pressure until it is cooled. Explain this phenomenon.

Answer :

Both ‘A’ and ‘B’ gas are in same condition of temperature and pressure .On increasing pressure gas ‘A’ liquefies but ‘B’ does not . At high pressure gas molecule come closer to each other and gas converted to liquid. But this phenomenon is based on critical temperature. Here ‘A’ gas liquefies easily that means gas ‘A’ is below its critical temperature. Gas ‘B’ not liquefy on applying high pressure because gas ‘B’ is above its critical temperature


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