PPT-Simple chemical reactions

Chemical change Reactions with acid Reactions with oxygen 7F 7F Simple chemical reactions Chemical change 7F Simple chemical reactions 7F Chemical change Changing materials How many different materials can you see in this bedroom. DEFINITIONS AND TYPES. Revision:. DO NOT WRITE- FOR YOUR INFO ONLY. We have looked at the period table, what atoms are, elements and compounds. You have learnt that atoms can join to make compounds or molecules and that we can mix compounds to make new compounds…..these are chemical reactions. Physical Science Notes. Physical Properties. PHYSICAL PROPERTY . - A feature or characteristic of matter which can be observed without changing the identity of the matter . Examples. :. . . Color. Chemical Equations. This equation means:. 4 Al(. s. ) + 3 O. 2. (. g. ) 2 Al. 2. O. 3. (. s. ). 4 Al atoms + 3 O. 2. molecules yield 2 molecules of Al. 2. O. 3. 4 Al . moles. Because . entropy is a state function, . the property is what it is regardless of pathway, the . entropy change for a given reaction can be calculated by taking the difference between the . standard entropy. Synthesis reactions. Decomposition reactions. Single replacement reactions. Double replacement reactions. (Precipitate reaction). Chemical Reactions can be written as:. Word equation. Chemical equation. 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 . 10.1 . Reactions and . Equations. Evidence of Chemical Reactions. ..  . The process of which the atoms of one or more substances are rearranged to form different substances is called a . Chemical Reaction. CONTENTS. CHEMICAL REACTION. CHARACTERISTICS OF CHEMICAL REACTION. TYPES OF CHEMICAL EQUATION. BALANCING OF CHEMICAL EQUATION. HOW TO MAKE EQUATION MORE INFORMATIVE. Grade Science. Bowling Green Junior High. What are chemical reactions?. Chemical Reaction. . – . a change that takes place when two or more substances (reactants) interact to form new substances (products) with new properties.. What is a chemical reaction?. A . chemical reaction. is a process that converts one or more substances into another substance.. Chemical Reactions. The starting substances are the . reactants. .. The resulting substances are the . The key words are emphasized in bold . and there is a list of them at the end of the presentation. . Chemical Reactions. When a chemical reaction occurs, new substances (called . products. ) form from the substances taking part in the reaction (called . In order for chemical reactions to take place, . enzymes . must be present to help . speed up . the reaction.. Chemical bonds connect atoms. to make . molecules. .. Chemical . reactions. can do two things:. What is a Chemical Reaction?. A Chemical reaction occurs when ever a chemical bond is formed, broken or rearranged.. A chemical reaction will always create a new substance.. Energy and Chemical Reactions. All. chemical reactions either release or absorb energy. . The energy can take many forms: . HEAT. , . LIGHT. , . SOUND. , and . ELECTRICITY. . Chemical . bonds. are the source of this energy. .