Unit 8: States of matter
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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. We also re-watch the video from Ted-Ed that review IMFs, which they call Van Der Waal Forces. |
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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. In this section we discuss the calorie, a unit of energy. We watched the video here to introduce that idea. |
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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:
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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. |
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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. |
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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:
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