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Chp7 - Chapter 7 Exercises Ideal Gas Law Problems 6-8 12 14...

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Chapter 7 Exercises Ideal Gas Law Problems 6-8, 12, 14 Intermolecular Forces Problems 18, 25, 26, 38-45, 48, 49 Phase Diagrams Problems 36, 37, 51, 52

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Chapter 7 States of Matter and Changes in State Behavior of Gases Kinetic Molecular Theory Intermolecular Forces (IMF) Behavior of Liquids Changes in State
Measuring Gas Earth covered in gas, must exert some pressure (P) Partial Pressure – each gas in a homogeneous mixture has its own pressure; [A] = n A /V (units of M) P total = RT ([A] + [B] + …)

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Boyle’s Law (Volume vs. Pressure) Manometer – measures gas against P atm P described by height of Hg V 1/P added Hg
Charles’ Law (Volume vs. Temp) Hot air balloon : as T ↑, V ↑ (V T) What is T, when V = 0? 273.15 K 373.15 K

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When These Laws Combine….. Boyle’s Law → V 1/P Charles’ Law → V T Avogadro’s Law → V n
….or the Ideal Gas Law Ideal Gas Law PV = nRT R = 0.082 L•atm/mol•K STP = 273 K, 1 atm, 1 mol What is volume of O 2 at STP and N 2 at STP?

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Kinetic Molecular Theory Theory of moving molecules 1) V gas is negligible to V container 2) Gases move in continuous random motion 3) Attractive and repulsive forces are negligible 4) Collisions are elastic 5) E therm T (E therm = average kinetic energy of system)
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