Ch05-B-phase diagrams

Ch05-B-phase diagrams - Chapter 5 B phase equilibria and...

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Unformatted text preview: Chapter 5: B: phase equilibria and diagrams CHM 341 Elementary Physical Chemistry Fall 2009 Ranko Richert vocabulary: physical transformations of pure substances phase transition transition temperature phase boundary vapor pressure sublimation vapor pressure boiling temperature normal boiling temp. (1 atm) standard boiling temp. (1 bar) critical temperature critical pressure supercritical fluid melting temperature freezing temperature normal freezing temp. (1 atm) standard freezing temp. (1 bar) triple point typical phase diagram (not H 2 O) non-equilibrium situation equilibrium situation p ≈ vapor pressure c T T << c T T < c T T > end of the liquid/gas phase boundary as the temperature is increased to above the critical point T c (a) (b) (c) Gibbs energy and the location of phase boundaries along the line representing the phase boundary, the two phases coexist in equilibrium ( ) ( ) ( ) ( ) V S dT dp dp V V dT S S dp V dT S dp V dT S dp V dT S dG dp V dT S dG dp V dT S dG Vdp SdT dG...
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Ch05-B-phase diagrams - Chapter 5 B phase equilibria and...

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