Unit_4_Gas_Laws - Lecture #4 Introductiontostandardset4.

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Lecture #4 Introduction to standard set 4.  Standard set 4 is the gas laws. Students are introduced to the kinetic molecular theory to explain pressure,  temperature, properties of gases, factors influencing gas pressure, the gas laws, ideal gases, and finally diffusion and  effusion explained through Graham’s law. Properties of Gases A.   Expansion 1.   Gases do not have a definite shape or volume  2.   Gases take the shape of their containers 3.   Gases evenly distribute themselves within a container B.   Fluidity  1.   Gas particles easily flow past one another C.   Low Density 1.   A substance in the gaseous state has 1/1000 the density of the same substance in the liquid  or solid state D.   Compressibility 1.   Gases can be compressed, decreasing the distance between particles, and decreasing the  volume occupied by the gas The Kinetic Theory and a Model for Gases A.   Assumptions of the Kinetic-Molecular Theory 1.   Gases consist of large numbers of tiny particles that are far apart relative to their size 2.   Gas particles undergo elastic collisions  a.    Collisions in which no energy is lost 3.   Gas particles are in constant, rapid motion. They therefore possess kinetic energy, the  energy of motion
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Lecture #4 Kinetic Energy and Temperature A.   Formula for Kinetic Energy  KE = ½ mv 2 , where m = mass and v = speed B.   Relationship to Temperature 1.   The average kinetic energy of gas particles depends on the temperature 2.   All gases at the same temperature have the same average kinetic energy a.    Small molecules (small mass, 
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This note was uploaded on 11/22/2011 for the course CHEMISTRY CHM1025 taught by Professor Laurachoudry during the Fall '10 term at Broward College.

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Unit_4_Gas_Laws - Lecture #4 Introductiontostandardset4.

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