Liquefaction of gases low temperatures, using, for example, turboexpanders. The liquefaction of air is used to obtain nitrogen, oxygen, and argon and other atmospheric noble gases by separating the air components by fractional distillation in a cryogenic air separation unit. Air is liquefied by the Linde process, in which air is alternately compressed, cooled, and expanded, each expansion results in a considerable reduction in temperature. With the lower temperature the molecules move more slowly and occupy less space, so the air changes phase to become liquid. Air can also be liquefied by Claude's process in which the gas is allowed to expand isentropically
Love Is the Sweetest Thing among others, have made recordings :- First introductory verse: Start of main refrain (nowadays "Verse One"): End of main refrain (nowadays "Verse Three"): For other works containing the phrase "The Sweetest Thing" see Sweetest Thing (disambiguation). Love Is the Sweetest Thing "Love Is the Sweetest Thing" is a popular song written in 1932 by British band leader and singer Ray Noble. Using guest vocalist Al Bowlly, Noble's recording was a big hit on both sides of the Atlantic, bringing Noble his first American success. It was published by Redwood Music. Like most compositions published in the period (commonly called Tin