Lec-24-Chap-10-1 - Properties of Gases CHE 131 Lecture 24...

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CHE 131 Lecture 24 – Pressure, Kinetic Theory, Ideal Gas Laws Chapter 10: pp. 457-467. Properties of Gases • can be compressed • exert pressure on whatever surrounds them • expand into whatever volume is available • easily diffuse into one another • can be described in terms of their temperatures and pressure,the volume occupied, and the amount (number of molecules or moles) present p.436a Common Gases and their Uses
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Compression of Gases Torricellian Barometer Gases exert pressure. - Works like a balance . Pressure pressure = force/area force = mass × acceleration 1 Standard Atmosphere = 1 atm 1 atm = 760 mm Hg(exactly) 760 mm Hg(exactly) = 760 torr 760 torr = 101.325 kPa 100 kPa = 1 bar Composition of Dry Air
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p.436b Earth’s Atmosphere Gas Pressure Kinetic Molecular Theory: Gases • particles in continuous, random, rapid motion • collisions between particles are elastic • volume occupied by the particles is negligibly small effect on their behavior • attractive forces between particles have a
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Lec-24-Chap-10-1 - Properties of Gases CHE 131 Lecture 24...

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