phase diagram of water ppt

The phase diagram of water is a common example. Water may stay in liquid solid or gaseous states in different pressure-temperature regions.

Example: Water – Sugar System. Question: What is the solubility limit at 20C? Equilibrium phase diagrams represents relations between temperature.

Schematic Phase Diagram of water. Phase Transition of ferromagnetism. 2-10. THERMODYNAMICS OF PHASE. TRANSITION ~EHRENFEST. CLASSIFICATION ~.

Water expands upon freezing. Fig. 3: phase diagram of pure substances. There are two ways that a substance can pass from solid phase to vapor phase i) it 

Remarkably nanoscale confinement drastically alters the properties of water. Using molecular dynamics simulations

Phase diagram of water and outline of water triple point cell is shown in Figure 2.1 and Figure 2.2. Thermometer well. Water vapor (gas). Ice (solid).

2013 surface water recon sampling 61 systems > 10 ppt Total Tested PFAS from Phase I ... Drinking water. ? 70 ppt PFOA/PFOS lifetime health advisory.

where double formula are used for ferric chloride in order to avoid a fractional number of molecules of water of crystallization. The phase diagram of this.

solid and liquid phase of lead are D in equilibrium at this point. Now if silver is added in it

Phase diagram of water and CO. 2. • Vapor compression refrigeration system. • Pressure-enthalpy diagram for refrigerants. • Refrigerator air conditioner 

Phasediagramofwater meltingpointdecreaseswithincreasing COmeltingpointincreaseswithincreasing 2 ATER Covers~ Lifeon ater Easily Yet70 of the earth’s surface earthdependsonwater isa“universal”solvent polluted;hardtopurify wateris an anomaly“Wateristhemostremarkablesubstance Howeverwateris oftenperceivedtobeprettyordinary Wewashinwaterfish

Phase diagram: information about phases as function of T composition and pressure A maximum concentration of solute atoms may dissolve in the solvent Solubility increases with T Solubility limit Phase Equilibria: Solubility Limit Question: What is the solubility limit at 20C? Answer: 65wt sugar

PhasePhase TransitionsTransitions Tboiling g Atconstantpressurethetotal maximizedbyminimizingthe energy:G=U– TS+pV entropy Gibb’s is free For phase = transitions: Ns+s+Nll Ngg Exceptatcoexistence energyisminimized moleculesbeinthe pointsthefree byhavingallthe phasewiththe lowest chemical potential at that temperature and Gasg LiquidL pressure

Water is Unusual The typical phase diagram The H 2O phase diagram Most materials freeze if you push hard enough but water melts! This results from the fact that water expands when it freezes (ice floats) Consequences: • Fish can live in wintry lakes because they don’t freeze solid • Ice is slippery when you skate on it GNOT!

Water Phase Diagram Phase diagrams The phase diagram of water Density change Triple points The ice phases Phase diagrams Phase diagrams show the preferred physical states of matter at different temperatures and pressure Within each phase the material is uniform with respect to its chemical composition and physical state

The phase diagram for the water system is shown in Fig 6 1 The phase diagram consists of Curves : There are three curves OA OB and OC Areas : Three curves OA OB and OC divide the diagram into three areas AOB AOC and BOC Triple point : The above three curves meet at the point O and is known as triple point