1. By: Mitchell Miller Chemical Reactions are a change in substance and a change in energy mainly affecting the atoms electrons http://www.usoe.k12.ut.us/CURR/Science/sciber00/8th/matter/sciber/c hemtype.htm

2. A chemical reaction happens when molecules interact causing a chemical change. This change means that the molecules that interacted are combined to form something different. During this a reactant (a substance or compound consumed during a chemical reaction) is consumed creating a product (a substance that forms as a result of a chemical reaction) that has the same mass as the product according to the law of conservation of mass which states that the mass of an isolated system will remain constant no matter what happens inside. http://www.windows.ucar.edu/tour/link=/e arth/geology/chem_reactions.html http://en.wikipedia.org/wiki/Product_(che mistry) http://en.wikipedia.org/wiki/Reagent

3. http://wiki.answers.com/Q/How_can_you_tell_a_chemical_reaction_is_occurring A Temperature change A color change An insoluble substance is formed A gas is given off

4. Synthesis Decomposition Combustion Single replacement Double replacement Each of these can exothermic or endothermic During a reaction something happens with the energy making it endothermic or exothermic: Endothermic- Energy is absorbed (often it is heat or electrical energy) Exothermic- Energy is released from the reactants often resulting in a heat increase http://www.usoe.k12.ut.us/CURR/Science/s ciber00/8th/mattr/sciber/chemtype.htm

5. During a reaction something happens with the energy making it endothermic or exothermic: Endothermic- Energy is absorbed (often it is heat or electrical energy) Exothermic- Energy is released from the reactants often resulting in a heat increase Potential Energy is the stored energy of position possessed by an object such as a rubber band when left to sit it has no energy, but when stretch it has gained energy. http://www.usoe.k12.ut.us/CURR/Science/s ciber00/8th/mattr/sciber/chemtype.htm http://www.glenbrook.k12.il.us/gbssci/phys/ Class/energy/u5l1b.html

6. This reaction is when two or more simple substances combine to create a more complex substance http://www.usoe.k12.ut.us/CURR/Science/s ciber00/8th/mattr/sciber/chemtype.htm A Synthesis reaction would look something like: A + B → AB meaning A plus B combined equal A and B http://en.wikipedia.org/wiki/Chemical_synt hesis

7. This reaction is when a complex reaction is broken into a smaller less complex parts. Basically the opposite of a synthesis http://www.usoe.k12.ut.us/CURR/Science /sciber00/8th/mattr/sciber/chemtype.ht m A decomposition reaction would look something like AB → A + B meaning AB is broken down into just A and B http://en.wikipedia.org/wiki/Chemical_dec omposition

8. The reaction of oxygen with anything else. http://dbhs.wvusd.k12.ca.us/webdocs/Equat ions/Combustion.html

9. Single replacement is a reaction where a single uncombined element replaces another in a compound. A double Replacement is a reaction where parts of two compounds swap places to form two different compounds. Chemical formula example of single replacement Chemical formula example of a double replacement http://www.usoe.k12.ut.us/CURR/Science/s ciber00/8th/mattr/sciber/chemtype.htm A Single replacement reaction formula would look something like A + BX → AX + B meaning the A has swapped with the B http://en.wikipedia.org/wiki/Single_re placement_reaction A double reaction formula would look like AB + CD → AD + CB meaning the B and the D swapped places http://en.wikipedia.org/wiki/Double_re placement_reaction

10. Potassium Permanganate and Glycerin cause an exothermic reaction http://wildeboer-fitch.wikispaces.com/Media-+Chemical+Rx http://www.youtube.com/watch?v=80Q3Gg eeIVM&eurl=http://wildeboer- fitch.wikispaces.com/Media- +Chemical+Rx&feature=player_embedded

11. Hg(HCN)2 causes an exothermic reaction http://wildeboer-fitch.wikispaces.com/Media-+Chemical+Rx http://www.youtube.com/watch?v=JAe6000 kwck&eurl=http://wildeboer- fitch.wikispaces.com/Media- +Chemical+Rx&feature=player_embedded

12. 2Mg + O2 --> 2MgO causes an exothermic reaction and is a synthesis reaction http://wildeboer-fitch.wikispaces.com/Media-+Chemical+Rx http://www.youtube.com/watch?v= RaIZ__BhC6M&eurl=http://wildebo er-fitch.wikispaces.com/Media- +Chemical+Rx&feature=player_emb edded

13. Fe2O3 + 2Al --> Al2O3 + 2Fe causes an exothermic reaction http://wildeboer-fitch.wikispaces.com/Media-+Chemical+Rx http://www.youtube.com/watch?v= WrCWLpRc1yM&eurl=http://wilde boer-fitch.wikispaces.com/Media- +Chemical+Rx&feature=player_em bedded

14. K2CrO4 + 2AgNO3 --> Ag2CrO4 + 2KNO3 Pb(NO3)2 + 2KI → PbI2 + 2KNO3 both causing exothermic reactions http://wildeboer-fitch.wikispaces.com/Media-+Chemical+Rx http://www.youtube.com/watch?v =opY3FLrPTa4&eurl=http://wilde boer-fitch.wikispaces.com/Media- +Chemical+Rx&feature=player_e mbedded

15. To react or not to react? THAT is the question! http://www.usoe.k12.ut.us/CURR/Science/sciber00/8th/matter/sciber/chemtype. htm http://www.usoe.k12.ut.us/CURR/Science/sciber00/8th/matter/sciber/chemtype. htm Chemical Reactions http://www.windows.ucar.edu/tour/link=/earth/geology/chem_reactions.html http://www.windows.ucar.edu/tour/link=/earth/geology/chem_reactions.html Reagent <http://en.wikipedia.org/wiki/Reagenthttp://en.wikipedia.org/wiki/Reagent Product (chemistry) http://en.wikipedia.org/wiki/Product_(chemistry)http://en.wikipedia.org/wiki/Product_(chemistry) How can you tell a chemical reaction is occurring? http://wiki.answers.com/Q/How_can_you_tell_a_chemical_reaction_is_occurrin g http://wiki.answers.com/Q/How_can_you_tell_a_chemical_reaction_is_occurrin g The Physics Classroom Tutorial http://www.glenbrook.k12.il.us/gbssci/phys/Class/energy/u5l1b.html http://www.glenbrook.k12.il.us/gbssci/phys/Class/energy/u5l1b.html Chemical synthesis http://en.wikipedia.org/wiki/Chemical_synthesishttp://en.wikipedia.org/wiki/Chemical_synthesis Chemical decomposition http://en.wikipedia.org/wiki/Chemical_decompositionhttp://en.wikipedia.org/wiki/Chemical_decomposition Reaction Types: Combustion http://dbhs.wvusd.k12.ca.us/webdocs/Equations/Combustion.html http://dbhs.wvusd.k12.ca.us/webdocs/Equations/Combustion.html Single displacement reaction http://en.wikipedia.org/wiki/Single_replacement_reaction http://en.wikipedia.org/wiki/Single_replacement_reaction

16. Chemical decomposition http://en.wikipedia.org/wiki/Chemical_decomposition http://en.wikipedia.org/wiki/Chemical_decomposition Reaction Types: Combustion http://dbhs.wvusd.k12.ca.us/webdocs/Equations/Combustion.html http://dbhs.wvusd.k12.ca.us/webdocs/Equations/Combustion.html Single displacement reaction http://en.wikipedia.org/wiki/Single_replacement_reaction http://en.wikipedia.org/wiki/Single_replacement_reaction Double displacement reaction http://en.wikipedia.org/wiki/Double_replacement_reaction http://en.wikipedia.org/wiki/Double_replacement_reaction Media- Chemical Rx http://wildeboer-fitch.wikispaces.com/Media- +Chemical+Rxhttp://wildeboer-fitch.wikispaces.com/Media- +Chemical+Rx Alien rock from Mars http://www.youtube.com/watch?v=JAe6000kwck&eurl=http://wildeboer -fitch.wikispaces.com/Media-+Chemical+Rx&feature=player_embedded http://www.youtube.com/watch?v=JAe6000kwck&eurl=http://wildeboer -fitch.wikispaces.com/Media-+Chemical+Rx&feature=player_embedded Exothermic reaction Potassium Permanganate http://www.youtube.com/watch?v=80Q3GgeeIVM&eurl=http://wildeboe r-fitch.wikispaces.com/Media- +Chemical+Rx&feature=player_embedded http://www.youtube.com/watch?v=80Q3GgeeIVM&eurl=http://wildeboe r-fitch.wikispaces.com/Media- +Chemical+Rx&feature=player_embedded

17. Burning of Magnesium Ribbon http://www.youtube.com/watch?v=RaIZ__BhC6M&eur l=http://wildeboer-fitch.wikispaces.com/Media- +Chemical+Rx&feature=player_embedded http://www.youtube.com/watch?v=RaIZ__BhC6M&eur l=http://wildeboer-fitch.wikispaces.com/Media- +Chemical+Rx&feature=player_embedded Thermite Experiment http://www.youtube.com/watch?v=WrCWLpRc1yM&e url=http://wildeboer-fitch.wikispaces.com/Media- +Chemical+Rx&feature=player_embedded http://www.youtube.com/watch?v=WrCWLpRc1yM&e url=http://wildeboer-fitch.wikispaces.com/Media- +Chemical+Rx&feature=player_embedded Double Replacement Reactions http://www.youtube.com/watch?v=opY3FLrPTa4&eurl =http://wildeboer-fitch.wikispaces.com/Media- +Chemical+Rx&feature=player_embedded http://www.youtube.com/watch?v=opY3FLrPTa4&eurl =http://wildeboer-fitch.wikispaces.com/Media- +Chemical+Rx&feature=player_embedded