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Four states of matter video clip: click here
Changes in State Four states of matter video clip: click here
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Book video clip: click here
Phase Diagram Book video clip: click here
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Phase Diagram MELTING FREEZING CONDENSATION VAPORIZAITON SUBLIMATION
TRIPLE POINT
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Triple Point The temperature & pressure at which a substance can exists in ALL 3 states of matter at the same time!! Very rare & hard to do Triple Point of Cyclohexane Video
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What word describes Motion or Movement energy?
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All matter’s particles are in constant motion
Kinetic Energy All matter’s particles are in constant motion
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State of Matter is determined by
Particle arrangement Energy of particles Distance b/w particles
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Kinetic Theory: Solids
Atoms are vibrating on a fixed point in a solid
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Book video clip: click here
Types of Solids Book video clip: click here
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Amorphous Solid Has no organized internal structure Rubber Plastic Glass Asphalt Cotton Candy
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Compounds with the highest melting points are….
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Melting Points Strongest ( highest): Ionic Bonding Hydrogen Bonding Dipole-Dipole Lowest ( weakest) Dispersion
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1. Ionic : strongest bond Crystalline structure
Bond kept together by…. Crystalline structure
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Covalent Compounds have three interactions( intermolecular forces) that keep them together….
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2. Hydrogen Bonding strongest covalent
Highest MP & BP of covalent Hydrogen attracted to: N itrogen O xygen F luorine
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3. Dipole-Dipole [polar]
- end attracted /// to + end of another
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4. Dispersion [nonpolar] weakest
-a dipole is induced -lowest MP & BP interaction Induced + Induced -
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Kinetic Theory: Liquids
Particles are not bound together in fixed positions, but there is still some attractive forces keeping them close during movement.
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Fluidity Particles flow, slide over each other
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Viscosity
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Kinetic theory of gases
Book clip: clip here
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Gas Particles Assumption #1:
Have a small volume Far apart from each other Independent : No attractive or repulsive forces
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Gas Particles Assumption #2:
Move: Rapid Independent Random Straight paths Only direction when rebounding
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Gas Particles Assumption #3
When particles collide, there collisions are elastic: no loss of energy it is transferred between the particles
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Force exerted when gas particles collide: click here
Gas Pressure Force exerted when gas particles collide: click here
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Pressure Units SI unit : Pascal (Pa) Sea level: 101.3 kPa
Millimeters of Mercury: mm Hg blood pressure Atmospheres: atm Atmospheric pressure Torr (Torrque- mostly physics and mechanics) Pounds per Square Inch: PSI Tire pressure, scuba diving Bar
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Conversions of Pressure
**1 atm = 760 mmHg = kPa** Other conversions 1 torr = 1 mm Hg 1 atm = 14.7 PSI 1 bar = 1 atm
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no gas particles = no collisions = NO PRESSURE
Vacuum no gas particles = no collisions = NO PRESSURE
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Gas particles in Air colliding in earth’s atmosphere
Atmospheric Pressure Gas particles in Air colliding in earth’s atmosphere
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Elevation and Atmospheric Pressure
↑ Elevation = ↓ Atmospheric Pressure b/c less gas particles =less collisions = P Sea Level more gas particles = more P
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More gas particles = More collisions= More pressure
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Evaporation vs Condensation
Eureka video clip: click here
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Evaporation Video Clip: Click here
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Equilibrium Book clip: click here
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Evaporation/ Condensation Equilibrium
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Evaporation/ Condensation Dynamic Equilibrium
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Evaporation/ Condensation Dynamic Equilibrium
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Boiling Vapor Pressure = External Pressure to
Liquid has enough HEAT/ENERGY to overcome the External Pressure Vapor Pressure = External Pressure
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Boiling Video clip: click here
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the EXTERNAL pressure is changed
to make something boil Energy/Heat is added Or the EXTERNAL pressure is changed
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Affect of Temp on Contained Liquid
KE of particles particle collisions Vapor Pressure This why a tea kettle whistles
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Elevation and BP
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Pressure Cooker Creates a High External Pressure
which prevents vapor bubbles from forming Allowing the liquids inside to get much hotter than normal (above boiling pt) , thus reducing the cooking time. Pot Roast that takes 3 hrs in the oven can cook in minutes!
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Temperature Video clip: click here
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Measuring Temperature
Eureka video clip: click here
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Temperature Movement of particles
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No movement of particles
Absolute Zero (0 K) No movement of particles
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Absolute Zero (0 K) Video Clip: Click here
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Kinetic Energy Temperature
Kinetic Energy↑ the Temp↑
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Remember: K =273 + C F = (9/5 C) + 32
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Exploring Heat Video clip: click here
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Heat vs. Temperature
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Application
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Distillation A homogenous mixture of liquids, a solution, can be separated using the knowledge that: every substance has a unique boiling point all gasses can condense
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Distillation
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Plasma in a Bottle Video Clip: click here
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Weather Video clip: Click here
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Scuba Video Clip: click here
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Nitrogen Narcosis Video Clip: click here
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