chem lecture 25

chem lecture 25 - General & Analytical Chemistry II...

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General & Analytical Chemistry II 1011-216 Winter 2008 Lecture 25
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General & Analytical Chemistry II Phase Diagrams A Phase Diagram is a map of the behavior of a substance at different temperatures and pressures.
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General & Analytical Chemistry II Isobaric and Isothermal Transitions Isobaric Path, K eq variable Isothermal Path, K eq constant
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General & Analytical Chemistry II Phase Equilibrium Apparatus • Piston with temperature and pressure control. • Substance can be introduced as solid, liquid or gas. • Piston pressure and temperature adjusted reversibly. Internal P and T = external P and T. • Piston can be closed: V changes. • Piston can be open: n changes P
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General & Analytical Chemistry II Interpreting Phase Diagrams - 1 1 – pure gas 2 – gas deposits – frost build-up. 3 – solid in equilibrium with gas at P 2 . 4 – solid melts under pressure to a liquid. 5 – pure liquid
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General & Analytical Chemistry II Interpreting Phase Diagrams - 2 6 – pure solid 4 – solid melts 7 – pure liquid 8 – bubbles of gas form, boiling begins 9 – pure gas
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This note was uploaded on 03/18/2010 for the course COS 101121501 taught by Professor Langner during the Fall '08 term at RIT.

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chem lecture 25 - General & Analytical Chemistry II...

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