PPT-Energy Changes in Chemical

Reactions CH 4 g 2O 2 g CO 2 g 2H 2 O g Exothermic process Heat is released Δ H E Products E Reactants ve. #1: What happens to a substance when a chemical change occurs?. #2: What are some signs of a chemical change?. Bell Ringer: Tuesday 10/1/13. Read the paragraph below and determine the main idea. Then, write and answer the questions. Comparing Changes. Physical Change. Alters the form or appearance of matter.. Substance. . remains the same. . after . the change. Examples. : . change in state (s-l-g), bending, crushing, chopping.. EQ: How are changes in matter related to changes . in energy?. Changes in Matter. You are at the beach. You built a sandcastle!. You notice storm clouds gathering in the distance.. You are sad : (. You know your sandcastle is about to go bye-bye.. Holt Science & Technology:. Physical Science. Chapter 14 Chemical Reactions. Section 4 Energy and Rates of Reactions. Section Outline. Reactions and Energy. - Exothermic reactions. . . Figure 1. Types of Chemical Reactions. Property. Is a description of an object. The tree is TALL. The tree is GREEN. If struck by lighting, the tree could catch FIRE (BURN). Physical Properties. Are determined by the use of the . . . . Reading to Learn: . Read the following passage and answer the questions that follow.. Terms to Know:. 1. Digestion. : is the process where food is . broken down . by the digestive system into . small nutrients . Law of Conservation of Energy. aka. First Law of Thermodynamics. the . first law of thermodynamics.  is a version of the . law of conservation of energy. , adapted for . thermodynamic.  systems. The . Navo. Middle School Science. Physical Change. A change in the size, shape, form, or state of matter that does not change the matter’s identity.. Examples:. Play-doh. being sculpted. Ice Cream melting. Science . Fifth Grade. Mr. Pate. Standards. S5P2. . Students will explain the difference between a physical change and a chemical change. . a. Investigate physical changes by separating mixtures and manipulating (cutting, . Chemical Reactions. :. A . chemical reaction . is a process that changes one set of chemicals into another by rearranging chemical bonds. The elements you start with are . reactants. The elements you end with are . Chemical Reactions. A . chemical reaction . is a process that changes, or transforms, one set of chemicals into another by changing the chemical bonds that join atoms in compounds. . @Mass and energy are conserved during chemical transformations.@. THINK ABOUT IT . Living things are made up of chemical compounds, but chemistry isn’t just what life is made . of—chemistry is also what life does. . . Everything that happens in an organism. —its growth, its interaction with the environment, its reproduction, and even its movement. Physical and Chemical Changes Physical and Chemical Properties Everything around us has physical and chemical properties. Physical Properties Characteristics you can observe without changing the substance into something new. Changes or transforms chemicals into . other. chemicals. Ex: Iron + Oxygen . . Iron Oxide (rust). Physical Science Review. What is the product?. What are the reactants?. Chemical formula. . shows the kind and proportion of atoms of each element that occurs in a particular compound.