What practical significance are the phenomena of the transition of matter from one state of aggregation to another?

The phenomenon of transition from one state of aggregation to another is of great practical importance, for example, metals are smelted in metallurgy to obtain alloys or metals are smelted from ore, gases are cooled to a liquid state to be stored and used in a compact form, for example, liquid nitrogen in medicine, ” dry ice “from carbon dioxide – for food storage, etc.

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