Ch 7 Student Notes

# Ch 7 Student Notes - 1 Chapter 7 Demo: I2, Br2, Cl2 2 Ch...

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1 Chapter 7 Demo: I 2 , Br 2 , Cl 2

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2 The Kinetic Molecular Theory and States of Matter Table 7.1 Distinguishing Properties of Solids, Liquids, and Gases _________________ is a measure of the change in volume due to a change in pressure. _________________ is a measure of the change in volume due to a change in temperature.
3 Figure 7.3 solid liquid gas Intermolecular Attractive Forces are a type of _____________ energy that is stored in matter. Particles of matter are always in motion and have ___________ Energies that increase with temperature. The relative strengths of Intermolecular Attractive Forces (cohesive forces) and Kinetic Energy (disruptive force) determine the ________________________________________ Intermolecular = between molecules Intramolecular = within molecules Kinetic has its roots in the Greek word kinesis= motion

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4 Figure 7.2 Kinetic energy is transmitted through ______ collisions . Figure 7.4 Gas molecules can be compared to billiard balls in random motion, bouncing off one another and off the sides of the pool table.
5 Kinetic Molecular Theory applied to an _______ Gas! (hypothetical gas) Particles of a gas are far apart. low density; compressible space Particles are in rapid, random, straight-line ________. collisions with the walls of the container are measured as pressure There are no ____________ forces between the particles. rapid expansion Individual particles move at different velocities and posses different __________ energies. the average kinetic energy is constant at a given temperature but increases with increasing temperature (in K); thermal expansion Collisions do not change the _________ energy. energy transfer during collision Real gases behave ________ at High Temperature and Low Pressure. Under these conditions, the kinetic energy (disruptive force) is much greater than the attractive forces in the gas.

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6 The Kinetic Molecular Theory as applied to a Liquid : Particles are touching small compressibility, high density ___________ is restricted small thermal expansion Attractive forces hold the volume but allow _______ definite volume, indefinite shape In liquids, the attractive forces (cohesive forces) and the kinetic energy (disruptive force) are of similar magnitude.
7 The Kinetic Molecular Theory as applied to a Solid : Particles are closely packed almost no compressibility, high density Motion is limited to ________ about a fixed position very small thermal expansion Attractive forces hold position and _________ definite volume, definite shape In solids, the attractive forces (cohesive forces) are much greater than the kinetic energy (disruptive force).

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8 Ch 7.3 Gas Law Variables Mass in moles ( n ) = independent of V, T, P Volume ( V ) = usually in L or mL Temperature ( T ) = always in K (kelvin) Pressure ( P ) = force applied unit area V, T & P are _____________ Gas Laws describe in mathematical terms the relationships between n, V, T, & P.
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## This note was uploaded on 06/03/2011 for the course CHM 123 taught by Professor Woodward during the Fall '08 term at Ohio State.

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Ch 7 Student Notes - 1 Chapter 7 Demo: I2, Br2, Cl2 2 Ch...

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