LECTURE 7.2 – HPHASE DIAGRAMS

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Presentation transcript:

LECTURE 7.2 – HPHASE DIAGRAMS

Today’s Learning Targets 7.3 – I can draw a phase diagram to describe how pressure and temperature are related and discuss what a triple point is. 7.4 – I can analyze and draw a heating curve to describe how energy is lost or gained while a substance changes phases. I can identify on the graph the Hfusion and the Hvaporization. 7.5 – I can describe a reaction using the ideas of enthalpy and entropy.

How are pressure temperature and phase related?

I. Pressure and Temperature The state of matter of a substance depends on both the temperature and pressure A phase diagram is a graph temperature, pressure, and phase for a substance

II. Important Points on a Phase Diagram Triple Point – The temperature and pressure conditions at which the solid, liquid, and gas phases of a substance coexist Critical Point – The temperature and pressure at which the gas and liquid state become identical and form one phase.

Melting/Fusion Freezing Vaporization Condensation Sublimation Print out. Have students label in their notes as you go through this graph. http://www.youtube.com/watch?v=OQPD4YBgeT8 Sublimation Deposition

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