Question

Explain the method of liquefying the helium gas ?

Answer 1

Answer:

The first method is based on cooling produced by adiabatic expansion where the expanding gas is cooled by doing external work. This phenomenon was observed by Clèment and Desormes in 1819 when they discovered the cooling of a gas in a container when its pressure was reduced by letting out some of the gas through a tap.

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Answer 2

Answer:

here is ur answer

Explanation:

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