KUDs+and+EQ

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 * March 27, 2010**


 * __Big Idea:__ Phase Change **

__**Enduring Understandings**__ There are three common states of matter
 * In a solid, particles are in contact and vibrating in place
 * In a liquid, particles are in contact but slide past each other
 * In a gas, the particles are far apart and moving fast

Phase change is a physical process that can either release or absorb energy
 * When an object releases energy, it undergoes freezing, condensation, or deposition
 * When an object absorbs energy, it undergoes vaporization (evaporation and boiling), melting, or sublimation

During phase change, energy is either added or released, but temperature doesn't change
 * The amount of energy required for phase change is either (molar) heat of fusion or (molar) heat of vaporization (*This is our rate: kJ/mol)
 * This energy goes to changing the arrangement of particles (breaking inter-particle attractions)

__**Knowledge and Skills**__
 * Vocabulary:**
 * ** Temperature = average kinetic energy **
 * ** Heat = energy transfered between two objects that are at different temperatures **
 * ** Thermal energy = total kinetic(?) energy of molecules **
 * ** Sublimation and Deposition **


 * Basic concepts:**
 * ** Properties of matter, including intermolecular forces, bonding, determines how matter changes **
 * ** Standard Temperature and Pressure **
 * ** MP=FP; BP=CP **
 * ** Similarities and differences between evaporation and boiling **
 * ** Arrangement and motion of particles in different states of matter, and kinetic molecular theory of gases **
 * ** Random motion of particles explains diffusion and evaporation **
 * Heating increases kinetic energy of atoms/molecules; with that temperature increases
 * When you have enough energy, you can break structure/intermolecular forces--melt, boil....change arrangement
 * Arrangement and motion of molecules at different states of matter


 * Skills:**
 * ** Read thermometer **
 * ** Read and interpret a phase diagram **
 * ** Convert between 3 temperature scales; understand absolute zero **
 * ** //calculations?// (amount of energy necessary to get from one phase/temperature to another phase/temperature) **

__**ESSENTIAL Essential Question:**__
 * How and why does matter change?


 * __Other Essential Questions:__**
 * Why at room temperature can chemicals exist in different phases?
 * What makes something frozen?
 * What makes materials different from each other?
 * What natural phenomenon are generated by heat?
 * How do matter and energy relate?
 * What is in the bubbles that form when water is boiling and why?