1. Chemical Reactions
By, Olivia Pierson

2. 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
Table of Contents

3. 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
Chemical Reactions: The Basics
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4. Signs of a Chemical Reaction
Change in temperature
Change in form
Change in color
Change in scent
Signs of a Chemical Reaction
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5. 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
Reactants & Products
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6. 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…

7. Law of Conservation of Mass
The Law of Conservation of Mass was discovered by Antoine Laurent Lavoisier in 1785
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8. 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.
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9. 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.
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10. 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.
Chemical Potential Energy
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11. 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.
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Activation Energy

12. 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.
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13. 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:
-ZnCO3(s) ZnCO(s) + CO2(g)
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Decomposition Reactions

14. 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.
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15. 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 ---> ZnCl2 + H2
Single Replacement Reaction

16. Double Replacement Reactions
A double replacement reaction is when two elements switch places in a chemical reaction. An example would be...
NaSOU4+PoBNF2=>PoBOU4+NaSNF2 The NaS and the PoB switched places.
Double Replacement Reactions

17. THE END

18. Most all pictures
Taken from clipart