Transcription of Chapter 9: Phase Diagrams
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Chapter 9: Phase Diagrams
Chapter 9 -1 ISSUES TO When we combine two equilibrium state do we get? In particular, if we composition ( , wt% Cu - wt% Ni), and--a temperature (T) many phases do we get?What is the composition of each Phase ?How much of each Phase do we get? Chapter 9: Phase DiagramsPhase BPhase ANickel atomCopper atomChapter 9 -2 Phase Equilibria: solubility LimitIntroduction Solutions solid solutions, single Phase Mixtures more than one Phase solubility Limit:Max concentration forwhich only a single Phase solution :What is thesolubility limit at 20 C?Answer: 65 wt% Co< 65 wt% sugar:syrupIf Co> 65 wt% sugar:syrup + Phase DiagramPure SugarTemperature ( C)020406080100Co=Composition (wt% sugar)L(liquid solution , syrup) solubility LimitL(liquid) + S(solid sugar)20406080100 Pure WaterAdapted from Fig.
solubility limit at 20°C? Answer: 65 wt% sugar . If Co < 65 wt% sugar: syrup If Co > 65 wt% sugar: syrup + sugar. 65 Sucrose/Water Phase Diagram Pure Sugar Temperature (°C) 0 20 40 60 80 100 Co =Composition (wt% sugar) L (liquid solution i.e., syrup) Solubility Limit L (liquid) + S (solid 20 sugar) 40 60 80 100 Pure Water Adapted from Fig. 9 ...
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