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CBSE Class 9 Answered

Explain how gases can be liquified?
Asked by | 03 Sep, 2008, 11:33: PM
Expert Answer

1. The first way and probably the most obvious is to subject the gas to intense cold by using freezing mixtures.

The other methods depend on the cooling effect of the gas as it expands.

2. Allow an ideal gas to expand so rapidly that no heat enters the system by using a Dewar or vacuum flask which insulates the contents from the external environment. This is called an adiabatic expansion.

Answered by | 04 Sep, 2008, 11:59: PM
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