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Title: Elementary Gas Laws
Author: E. F. D.AWSON
Source: 1940 Southwestern Gas Measurement Short Course (Now called ISHM)
Year Published: 1940
Abstract: STArt:S OF MATTER Matter is said to exist as a solid, liquid, or pas. Fluids, : mtercst to the engineering field, i. e., water, ammonia, ,-phur dioxide, freon, air, oxygen, nitrogen, carbon dioxide, : iro.een, etc., may exist in one or more of these phases : the range of pressures and temperatures encountered in i.dern engineering practice. These phases or conditions of :-.:t-r are more often referred to as States of Matter. It ::-nimon knowledge that water in the liquid state may he imeed to ice or steam. The operation of the vapor com- sion system of refrigeration depends upon the change : refrigerants from the liquid state to the gaseous state, ni vice versa.

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