This applet demonstrates a fairly typical phase diagram, showing the regions of solid, liquid, and gas, as well as "vapor". Vapor is the material in which liquid and gas have equal densities - this occurs above the critical temperature Tc.
Click on any region of the map, and the appropriate phase designation will appear to the right.
Notice that if we follow the line of 1.00 atm to the right (thereby increasing the temperature, that we pass from a region where the CO2 is solid, to the next region where it is a gas, without passing through any intermediate region where the material is a liquid. We call this process "sublimation".
© 2003-2011 by Lawrence T. Sein. All rights reserved.
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