States of Matter (1)

States of Matter (1) - CHEMISTRY 139 Chemistry: Physical...

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1 CHEMISTRY 139 – Chemistry: Physical Principles Unit 2 States of Matter Gases Chapt. 5: 5.1 – 5.5 Liquids and Solids Solutions gas Molecular Level Structure Dynamics (motion) Macroscopic Level Properties Observables solid liquid States of Matter Often important:
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2 Gases Macroscopic Level Properties Observables Which physical properties? - atmosphere of Earth and other planets - engineering - biological systems Gases Barometer P F A Pressure: = force exerted over an area SI units: Pa = N/m 2 ; kPa = 10 3 Pa Common: 1 atm = 101.3 kPa = 760 mmHg (Torr) P = r g h An equalization of pressure: P atmoshere = P Hg
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3 The Molecular View: Kinetic Molecular Theory = the "ideal gas" Molecular Level Structure Dynamics (motion) Intermolecular Forces Macroscopic Level Properties Observables E.g. T, V, n, P 1. Gases made of tiny particles moving completely randomly. 2. Total volume of particles very small compared to size of container. 3. Particles do not interact with each other.
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States of Matter (1) - CHEMISTRY 139 Chemistry: Physical...

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