THERMO Spoken Here! ~ J. Pohl © ~ 2019 (D0040-195)

4.01 Phases at One Atmosphere

The Greeks classed matter as being either solid or fluid. By their industrial (casting golden crowns or bronze swords) and culinary (cooking tough meat) processes they understood some aspects of phase and phase change of matter at the pressure, 1.0 atmosphere. Today matter is classed as solid, liquid or gas. Matter as its solid has the least enregy and lowest temperature. Commencing at Standard Temperature and Pressure, STP, There are three basic behaviors as temperature changes. These are differentiated by the initial condition, that of the substance at standard temperature.

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