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Table of ContentsTable of Contents

Chemical Reactions: The BasicsSigns of a Chemical ReactionReactants & ProductsLaw of Conservation of massEnergy & Chemical ReactionsExothermic ReactionsActivation Energy

Chemical Reactions: Chemical Reactions: The BasicsThe Basics

What part of atoms are affected? -the electrons are affectedWhat is happening during a chemical reaction?

-one or more bonds between atoms are either broken or new ones are formed

Information: www.wikianswers.com

Signs of a Signs of a Chemical ReactionChemical Reaction

Change in temperatureChange in formChange in colorChange in scent

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Reactants & Reactants & ProductsProducts

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

Law of Conservation Law of Conservation of Massof MassEnergy 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_conservation_of_mass&alreadyAsked=1

Law of Law of Conservation of Conservation of MassMassThe Law of Conservation of Mass was discovered by Antoine Laurent Lavoisier in 1785

Image: https://images.google.com/Lavoisier

Energy & Chemical Energy & Chemical ReactionsReactionsWhat 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

Exothermic ReactionsExothermic 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

Chemical Potential Chemical Potential EnergyEnergy

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

Activation EnergyActivation 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

Synthesis ReactionsSynthesis ReactionsWhat 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

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Decomposition ReactionsDecomposition 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)

Image: www.chemistryexplained.com

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Combustion ReactionsCombustion 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

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Single Replacement Single Replacement ReactionReaction

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

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Double Double Replacement Replacement ReactionsReactions

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.

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