2. By, sweetcutie1124

3. Table of Contents Chemical Reactions: The Basics Signs of a Chemical Reaction Reactants & Products Law of Conservation of mass Energy & Chemical Reactions Exothermic Reactions Activation Energy

4. Chemical Reactions: The Basics What part of atoms are affected? -the electrons are affected What is happening during a chemical reaction? -one or more bonds between atoms are either broken or new ones are formed Information: www.wikianswers.com

5. Signs of a Chemical Reaction Change in temperature Change in form Change in color Change in scent Information: www.wikianswers.com

6. Reactants & Products What are Reactants ? - reactants are two or more elements that chemically interact to form a new substance. What is a Product ? -a product is the result of the experiment, what is produced at the end Information: www.wikianswers.com

7. Law of Conservation of Mass Energy cannot be created nor destroyed but it can change forms (solid, liquid, gas, plasma) How it is related to a chemical reaction is the energy is not created nor destroyed but it changes forms, such as going from a solid to a liquid, liquid to gas, or solid to gas, liquid to solid, gas o solid…ect… http://wiki.answers.com/Q/What_is_the_law_of_c onservation_of_mass&alreadyAsked=1

8. Law of Conservation of Mass The Law of Conservation of Mass was discovered by Antoine Laurent Lavoisier in 1785 Image: https://images.google.com/Lavoisier

9. Energy & Chemical Reactions What is an endothermic reaction ? -an endothermic reaction, for example, is when is when you mix two solids called barium hydroxide and ammonium salt. When mixed they dissolve together Into water of hydration, therefore They become very cold. Image: http://genchem.chem.wisc.edu/demonstrations/Movies/endosm.gif

10. Exothermic Reactions What is an exothermic reaction? -a candle for example When enough heat is applied to a candle it starts to oxidize. The paraffin reacts with the water resulting in carbon dioxide and water, also heat and light. The reaction creates visible light, the flame. Information: http://chemistry.about.com

11. Chemical Potential Energy What is chemical potential energy? - chemical potential energy is energy which is stored in the chemical bonds of the atoms in a molecule. When the bonds are re-arranged, energy can be released. Information: http://www.psd70.ab.ca/sgchs/Sc10/potent.html

12. Activation Energy Activation Energy is the energy needed by a system to initiate a particular process. It is often used to denote the minimum energy needed for a specific chemical reaction to occur. Information: http://www.bio-medicine.org

13. Synthesis Reactions What is happening in a synthesis reaction? -In a synthesis reaction, two or more substances combine to form another substance -It’s the formation of a complex compound by the combination of two or more simpler compounds, elements, or radicals. Image: http://www.usoe.k12.ut.us/CURR/Science/sciber00/8th/matter/images/SYNTHES.GIF http://wiki.answers.com/Q/What_is_a_s ynthesis_reaction&alreadyAsked=1

14. Decomposition Reactions What is happening in a decomposition reaction? -A decomposition reaction is where one single compound breaks down into two or more simpler chemicals. An example of this is the decomposition of zinc carbonate, represented by the equation: -ZnCO 3 (s) ZnCO(s) + CO 2 (g) Image: www.chemistryexplained.com http://wiki.answers.com/Q/If_heat_must_be_adde d_to_a_chemical_reaction_for_the_reaction_to_ta ke_place_the_reaction_is&alreadyAsked=1&rtitle= What_is_a_decompostition_reaction

15. Combustion Reactions What is happening in a combustion reaction? -A combustion reaction is a reaction in which a substance reacts with oxygen and heat is released. Image: http://www.process-heating.com/PH/2002/08/Files/Images/116295.gif http://wiki.answers.com/Q/What_is_a_combustion_rea ction&alreadyAsked=1

16. Single Replacement Reaction A single replacement is when a single uncombined element replaces another in a compound. Two reactants yield two products. For example when zinc combines with hydrochloric acid, the zinc replaces hydrogen. The chemical equation for this single replacement reaction looks like: Zn + 2HCl ---> ZnCl 2 + H 2 http://wiki.answers.com/Q/What_is_a_single_repla cement_reaction&alreadyAsk

17. Double Replacement Reactions A double replacement reaction is when two elements switch places in a chemical reaction. An example would be... NaSOU 4 +PoBNF 2 =>PoBOU 4 +NaSNF 2 The NaS and the PoB switched places. http://wiki.answers.com/Q/What_is_a_double_rep lacement_reaction&alreadyAsked=1