1. Drill – 10/4 What is Chemistry? What is Chemistry? What does the word “conservation” mean? What does the word “conservation” mean?

2. Objective SWBAT to define the Law of Conservation of Mass and Energy SWBAT to define the Law of Conservation of Mass and Energy

3. Law of Conservation of Mass and Energy

4. Mass and energy are neither created nor destroyed during ordinary chemical reactions or physical changes. Mass and energy are neither created nor destroyed during ordinary chemical reactions or physical changes. They are just rearranged! They are just rearranged! The mass of all the reactants is equal to the mass of all the products. The mass of all the reactants is equal to the mass of all the products. The energy that goes in to the reaction is equal to the energy that comes out. The energy that goes in to the reaction is equal to the energy that comes out.

5. What is energy? Energy is the capacity to do work or to produce heat. Energy is the capacity to do work or to produce heat. Forms of Energy: Forms of Energy: Potential Energy = stored energy Potential Energy = stored energy Kinetic Energy = energy of motion Kinetic Energy = energy of motion

6. Transfer of Energy Endothermic – energy is absorbed (in) Endothermic – energy is absorbed (in) Exothermic – energy is released (exit) Exothermic – energy is released (exit) 1. Sublimation 2. Condensation 3. Melting 4. Deposition

7. FYI There will be a Unit 2 Quiz next Tuesday on: There will be a Unit 2 Quiz next Tuesday on: Types of matter – element, compound, homogenous mixture, heterogeneous mixture Types of matter – element, compound, homogenous mixture, heterogeneous mixture Phases/States of matter – solid, liquid, & gas Phases/States of matter – solid, liquid, & gas Physical & Chemical changes Physical & Chemical changes Separations Separations Law of Conservations of Mass & Energy Law of Conservations of Mass & Energy