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Revision as of 20:45, September 29, 2007
, 20:45, September 29, 2007grr I have to leave but I don't want to leave this in my browser or leave it half finished
[[Image:CO2phase.jpg|thumb|right|300px|Phase diagram of CO<sub>2</sub>]]
A '''phase diagram''' is a graphical way of showing the [[physical state]] of a pure substance at varying [[pressure]]s and [[temperature]]s. As seen in the image to the right, a phase diagram is typically represented as a graph with temperature on the [[x-axis]] and pressure on the [[y-axis]].<ref name="atkins">Atkins, Peter and Julio de Paula. ''Physical Chemistry Volume 1, 8e.'' Oxford University Press: 2006.</ref>
A phase diagram will always have a number of lines on it, representing a phase [[equilibrium]], that is, the set of temperatures and pressures at which one phase is in equilibrium with another phase. These lines are called [[phase boundary|phase boundaries]], and they section the area of the plot into the three phases of [[matter]] ([[solid]], [[liquid]], and [[gas]]) as well as the [[supercritical fluid]] region.<ref name="atkins">
Along with the phase boundaries, there are two important points on a phase diagram: the [[triple point]] and the [[critical point]]. The triple point is the unique temperature and pressure at which all three phases of matter coexist in equilibrium.
==Analysis of Phase Diagrams==
==Other Types of Phase Diagrams==
A '''phase diagram''' is a graphical way of showing the [[physical state]] of a pure substance at varying [[pressure]]s and [[temperature]]s. As seen in the image to the right, a phase diagram is typically represented as a graph with temperature on the [[x-axis]] and pressure on the [[y-axis]].<ref name="atkins">Atkins, Peter and Julio de Paula. ''Physical Chemistry Volume 1, 8e.'' Oxford University Press: 2006.</ref>
A phase diagram will always have a number of lines on it, representing a phase [[equilibrium]], that is, the set of temperatures and pressures at which one phase is in equilibrium with another phase. These lines are called [[phase boundary|phase boundaries]], and they section the area of the plot into the three phases of [[matter]] ([[solid]], [[liquid]], and [[gas]]) as well as the [[supercritical fluid]] region.<ref name="atkins">
Along with the phase boundaries, there are two important points on a phase diagram: the [[triple point]] and the [[critical point]]. The triple point is the unique temperature and pressure at which all three phases of matter coexist in equilibrium.
==Analysis of Phase Diagrams==
==Other Types of Phase Diagrams==