Phase diagram is a graphical representation of the physical states of a problem under different conditions of temperature and also pressure. A common phase diagram has actually pressure ~ above the y-axis and temperature ~ above the x-axis. As we cross the currently or curves on the phase diagram, a phase change occurs. In addition, two states of the substance coexist in equilibrium ~ above the present or curves.

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A phase change is the shift from one state of matter to another. There space three states of matter: liquid, solid, and gas.

Liquid: A state of issue that is composed of loose, free moving corpuscle which type the shape set by the limits of the container in i beg your pardon the fluid is in. This happens since the activity of the individual particles in ~ a fluid is much less minimal than in a solid. One may an alert that part liquids flow readily whereas part liquids circulation slowly. A liquid"s loved one resistance to circulation is viscosity. Solid: A state of matter with tightly packed particles which perform not change the shape or volume the the container the it is in. However, this does not mean that the volume the a solid is a constant. Solids can expand and also contract when temperatures change. This is why once you look increase the thickness of a solid, it will indicate the temperature in ~ which the value for thickness is listed. Solids have strong intermolecular forces that store particles in nearby proximity to one another. An additional interesting point to think about is the all true solids have crystalline structures. This method that your particles space arranged in a three-dimensional, orderly pattern. Solids will certainly undergo phase changes when lock come throughout energy changes. Gas: A state of matter where particles room spread out with no definite form or volume. The particles of a gas will certainly take the shape and fill the volume that the container the it is put in. In a gas, there space no intermolecular pressures holding the corpuscle of a gas together since each fragment travels at its own speed in its very own direction.

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The corpuscle of a gas are frequently separated by great distances.

Phase diagrams highlight the variations in between the claims of matter of facets or compounds together they relate to pressure and temperatures. The adhering to is an instance of a step diagram for a share single-component system:

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Figure (PageIndex2a): phase diagrams because that CO2


Figure (PageIndex2b):Phase diagrams because that H2O