Ch. 7.1 to 7.6

Ch. 7.1 to 7.6 - Gas Laws 7.1 7.7 7.2 Physical States Solid...

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Gas Laws 7.1 – 7.7
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7.2 Physical States Solid Liquid Gas Volume Definite Definite Indefinite Shape Definite Indefinite Indefinite Density High High Low Compressi bility Small Small Large Thermal Expansion Small Small Moderate
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7.2 Assumptions about Gases Kinetic molecular theory is a model meant to predict the properties of gases Assumptions of the model: 1. Gas particles (e.g. atoms, molecules (N 2 )) have negligible volume 2. Gas particles are in constant, random motion Speed is decided by Temperature 3. Collisions of particles are elastic, they do not slow down due to collisions
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7.3 Pressure Pressure : The force of gas molecules colliding against the walls of a container Pressure is affected by: Temperature; the faster the gas moves the more force it imparts Volume; less volume means more molecules hit a smaller area
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7.3 Common units of pressure Atmosphere (atm) is the most common in this class 1 atm = 14.7 psi (pounds per square inch) 1 atm = 760 mm Hg (millimeters of Mercury) Convert 29 psi to atm
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Ch. 7.1 to 7.6 - Gas Laws 7.1 7.7 7.2 Physical States Solid...

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