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Unit 8: States of matter 

Unit 8 Packet
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Unit 8 is, in my opinion, the hardest unit of the year.  It encompasses two units in reality. To assess this unit we will have two (2) quizzes.  One on thermochemistry, and one on gases. 

​We begin with thermochemistry by reviewing intermolecular forces (IMFs).  This lecture is the first of two that we go over on the first day of this unit.  








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We also re-watch the video from Ted-Ed that review IMFs, which they call Van Der Waal Forces.




The second half of day one sees us cover a brief understanding of thermodynamics, and energy.  Here we look at the two types of energy, kinetic energy which we equate to temperature; and potential energy which is called enthalpy or the heat of a substance.







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In this section we discuss the calorie, a unit of energy.  We watched the video here to introduce that idea.
The main point of our thermodynamics sub-unit is being able to calculate the energy transferred into/out of a system.  Make sure you can accomplish this as your first unit 8 quiz will have you:
  • calculate the molar mass of a substance from it's mass and number of particles
  • discuss a heating/cooling curve in terms of state of matter and energy gained/lost
  • calculate the energy gained/lost at various parts of a heating/cooling curve
  • calculate the energy gained/lost by the surroundings of a system
  • discuss intermolecular forces in terms of a heating/cooling curve
Unit 8 Take Home Quiz I



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After the quiz on thermochemistry we started our second half of unit 8, gases.  Here we learned about the units of pressure, and how pressure affects the state of matter of a substance.

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During class we went over the kinetic molecular theory (KMT), an attempt to explain some of the strange properties of gasses.  The KMT is also utilized as the foundation of all the gas laws we are about to discuss so you will need to know this concept to make it any further.



Ideal gases behave a very particular way and this allows us to calculate their volume, pressure, and temperature by three gas laws.  In class we discussed their history and how to memorize all three without a great deal of work.
We finish unit 8 talking about the ideal gas law, probably the most useful of all the gas laws and the star of your next quiz.  For the second quiz of unit 8 you will need to:
  • Determine the pressure of a gas within a system
  • Calculate the moles of that gas, and its mass
  • based on a change in temperature, how would the volume of the gas change
  • based on a change in temperature, how would the pressure change​
Unit 8 take home quiz II
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  • Home
  • AP Chemistry
    • Unit 1: Atomic Structure
    • Unit 2: Chemical bonds
    • Unit 3: IMFs
    • Unit 4: Chemical Reactions
    • Unit 5: Kinetics
    • Unit 6: Thermochemistry
    • Unit 7: Equilibrium
    • Unit 8: Acid Base
    • Unit 9: Practical Thermo
    • AP Exam Review
  • Chemisty
    • Unit 1
    • Unit 2
    • Unit 3
    • Unit 4
    • Unit 5 & 6
    • Unit 7
    • Unit 8
    • Unit 9
    • Unit 10
    • Unit 11
    • Unit 12
    • Unit 13
    • SOL
  • CNU Biology Lab 109
    • Lab 1: Scientific Investigation
    • Lab 2: Genetic Variation
    • Lab 3: Passive Transport
    • Lab 4: Evolution
    • Lab 5: Fermentation
    • Lab 6: Ecology
  • Home
  • AP Chemistry
    • Unit 1: Atomic Structure
    • Unit 2: Chemical bonds
    • Unit 3: IMFs
    • Unit 4: Chemical Reactions
    • Unit 5: Kinetics
    • Unit 6: Thermochemistry
    • Unit 7: Equilibrium
    • Unit 8: Acid Base
    • Unit 9: Practical Thermo
    • AP Exam Review
  • Chemisty
    • Unit 1
    • Unit 2
    • Unit 3
    • Unit 4
    • Unit 5 & 6
    • Unit 7
    • Unit 8
    • Unit 9
    • Unit 10
    • Unit 11
    • Unit 12
    • Unit 13
    • SOL
  • CNU Biology Lab 109
    • Lab 1: Scientific Investigation
    • Lab 2: Genetic Variation
    • Lab 3: Passive Transport
    • Lab 4: Evolution
    • Lab 5: Fermentation
    • Lab 6: Ecology