Chem 1075Chapter 8 Lecture Outline

Chem 1075Chapter 8 Lecture Outline - Chem 1075 Slide 2...

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Chem 1075 Chapter 8 Chemical Reactions Lecture Outline Slide 2 Chemical & Physical Changes In a physical change , the __________________________________of the substance remains ______________________. Examples: In a chemical change , the __________________________________of the substance _______________________; a chemical _____________________ occurs. During a chemical reaction, a _______ _________________ is formed. Slide 3-6 Evidence for Chemical Reactions 4 Observations which indicate a chemical reaction: 1. A _________ is released. 2. An _______________ ________________ is produced. A substance dissolves in ______________to give an aqueous solution . If we add two ______________ solutions together, we may observe the production of a _____________________ substance. The insoluble solid formed is called a ______________________ 3. A permanent _______________ ________________ is observed. 4. A _______________ _________________ __________________ is observed. A reaction that ________________________________heat is an exothermic reaction . A reaction that ________________________________ heat is an endothermic reaction . Examples of a heat energy change in a chemical reaction are ______________ and ___________________ given off. Slide 7 Writing Chemical Equations A _____________________ _______________________ describes a chemical reaction using ______________________ and ____________________. A general chemical equation is: A + B C + D In this equation, A and B are ______________________ and C and D are _____________________. We can also add a _____________________ to a reaction. A catalyst is written _______________the arrow and __________________ _________ the reaction without being ________________________. PDF created with FinePrint pdfFactory trial version http://www.pdffactory.com
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Slide 8 States of Matter in Equations When writing chemical equations we usually specify the ______________________ of the reactants and products. A(g) + B(l) C(s) + D(aq) In this equation, reactant _____ is in the ____________state and reactant _____ is in the _____________ state. Also, product _____ is in the ____________ state and product _____ is in the __________________ state. Slide 9 Chemical Equation Symbols Slide 10 A Chemical Reaction Let’s look at a chemical reaction: HC 2 H 3 O 2 (aq) + NaHCO 3 (s) NaC 2 H 3 O 2 (aq) + H 2 O(l) + CO 2 (g) The equation reads as follows: ______________________________________________ is added to _____________________________ _______________________________ and yields _____________________________________________, ____________________________ and ________________________________________. Slide 11
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This note was uploaded on 01/12/2012 for the course CHEM 1075 taught by Professor Beverlykelley during the Winter '09 term at NorthWest Arkansas Community College.

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Chem 1075Chapter 8 Lecture Outline - Chem 1075 Slide 2...

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