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. Relating that no matter which reaction occurs the matter will remain in number the same just will appear differently such as fire turns wood into ashes and smoke and does not remove the wood from existance altogether. 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. Activation energy is the energy required to begin a certain Chemical reaction like Magnesium burning is Magnesium reacting with Oxygen to create magnesium oxide using heat (fire) to start the reaction http://www.bio-medicine.org/biology-definition/Activation_energy/ Burning Magnesium

5. 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

6. 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 Chemical potential energy is the energy in a chemical that comes from the arrange of atoms and molecules in objects that is released of transferred by a chemical reaction http://www.usoe.k12.ut.us/CURR/Science/s ciber00/8th/mattr/sciber/chemtype.htm http://en.wikipedia.org/wiki/Potential_ener gy#Chemical_potential_energy

7. This is a reaction occurs when one or more chemicals combine to form a new more complex chemical 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 equals A and B together http://en.wikipedia.org/wiki/Chemical_synt hesis

8. This reaction is when a complex chemical is split into smaller parts. The opposite of 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 alone http://en.wikipedia.org/wiki/Chemical_dec omposition

9. A reaction that reacts with O2 present and always has a flame and is exothermic is combustion http://dbhs.wvusd.k12.ca.us/webdocs/Equat ions/Combustion.html A house collapsing from a fire inside the house

10. A Single replacement is a reaction where a single element replaces another in a different compound that creates something different and new. A double Replacement is a reaction where parts of two compounds swap places to form two different and new 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 creating something new 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

11. 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

12. 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

13. 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

14. 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

15. 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

16. 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

17. 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

18. Burning of Magnesium Ribbon http://www.youtube.com/watch?v=RaIZ__BhC6M&eurl=htt p://wildeboer-fitch.wikispaces.com/Media- +Chemical+Rx&feature=player_embedded http://www.youtube.com/watch?v=RaIZ__BhC6M&eurl=htt p://wildeboer-fitch.wikispaces.com/Media- +Chemical+Rx&feature=player_embedded Thermite Experiment http://www.youtube.com/watch?v=WrCWLpRc1yM&eurl=h ttp://wildeboer-fitch.wikispaces.com/Media- +Chemical+Rx&feature=player_embedded http://www.youtube.com/watch?v=WrCWLpRc1yM&eurl=h ttp://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 Chemistry comes alive! (picture) http://jchemed.chem.wisc.edu/JCESOFT/CCA/CCA3/STILLS /MAGAIR/MAGAIR/64JPG48/2.JPG http://jchemed.chem.wisc.edu/JCESOFT/CCA/CCA3/STILLS /MAGAIR/MAGAIR/64JPG48/2.JPG Bio-Medicine www.bio-medicine.org/biology-definition/Activation_energy