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A phase diagram in physical chemistry, engineering, mineralogy, and materials science is a type of chart used to show conditions (pressure, temperature, etc.) at which thermodynamically distinct phases (such as solid, liquid or gaseous states) occur and coexist at equilibrium.
Phase diagram is a graphical representation of the physical states of a substance under different conditions of temperature and pressure. A typical phase diagram has pressure on the y-axis and temperature on the x-axis. As we cross the lines or curves on the phase diagram, a phase change occurs.
Learn about phase diagrams and how they represent the states of matter and transitions between them.
Phase diagrams are one of the most important sources of information concerning the behavior of elements, compounds and solutions. They provide us with the knowledge of phase composition and phase stability as a function of temperature (T), pressure (P) and composition (C).
Phase diagrams illustrate the phases of a system at equilibrium as a function of 2 or more thermodynamic variables. Phase diagrams are also particularly useful because they obey the laws of thermodynamics and there are constraints on the structure of phase diagrams, particularly the Gibbs Phase Rule.
To understand the basics of a one-component phase diagram as a function of temperature and pressure in a closed system. To be able to identify the triple point, the critical point, and four regions: solid, liquid, gas, and a supercritical fluid.
Explain the construction and use of a typical phase diagram; Use phase diagrams to identify stable phases at given temperatures and pressures, and to describe phase transitions resulting from changes in these properties; Describe the supercritical fluid phase of matter
phase diagram, graph showing the limiting conditions for solid, liquid, and gaseous phases of a single substance or of a mixture of substances while undergoing changes in pressure and temperature or in some other combination of variables, such as solubility and temperature.
The temperature and pressure conditions at which a substance exists in solid, liquid, and gaseous states are summarized in a phase diagram for that substance. Phase diagrams are combined plots of three pressure-temperature equilibrium curves: solid-liquid, liquid-gas, and solid-gas.
A phase diagram is a plot that illustrates the different phases of a substance across multiple variables, most often temperature and pressure. The diagram can help to demonstrate how changing these variables affects the state of matter of a particular substance.