Types of Reactions
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Transcript of Types of Reactions
Types of Reactions
1. Exothermic reaction 6. Double Replacement2. Endothermic reaction 7. Combustion3. Synthesis4. Decomposition5. Single replacement
By: Caitlin Shroyer
CitationsEndothermic Reaction: Info: http://www.usoe.k12.ut.us/CURR/Science/sciber00/8th/matter/sciber/chemtype.htm Picture: http://jchemed.chem.wisc.edu/jcesoft/cca/CCA3/MAIN/ENDO2/PAGE1.HTM
Exothermic Reaction:Info: http://www.usoe.k12.ut.us/CURR/Science/sciber00/8th/matter/sciber/chemtype.htm , Picture: http://en.wikipedia.org/Exothermic_reaction
Synthesis:Info: http://www.usoe.k12.ut.us/CURR/Science/sciber00/8th/matter/sciber/chemtype.htm Picture: http://jchemed.chem.wisc.edu/JCESoft/CCA/CCA3/STILLS/NACL/NACL1/64JPG48/20.JPG
Decomposition:Info: http://www.usoe.k12.ut.us/CURR/Science/sciber00/8th/matter/sciber/chemtype.htm Picture: http://wildeboer-fitch.wikispaces.com/Media-+Chemical+Rx#toc17
Double Replacement:Info: http://www.usoe.k12.ut.us/CURR/Science/sciber00/8th/matter/sciber/chemtype.htm Picture: http://wildeboer-fitch.wikispaces.com/Media-+Chemical+Rx#toc23
Single Replacement:Info: http://www.usoe.k12.ut.us/CURR/Science/sciber00/8th/matter/sciber/chemtype.htm Picture: http://wildeboer-fitch.wikispaces.com/Media-+Chemical+Rx
Combustion:Info: http://www.marymount.k12.ny.us/marynet/stwbwk05/05flashchem/lyreaction/lyreaction.html Picture: http://wildeboer-fitch.wikispaces.com/Media-+Chemical+Rx
Exothermic Reaction
• Release energy in the form of heat, light ,or sound• May occur spontaneously and result in higher randomness of entropy of the system• May produce heat or may even be explosive
Fe2O3 + 2Al -> 2Fe + Al2O3 + Heat
Endothermic Reaction
• They must absorb energy in order to proceed• Can not occur spontaneously • They absorb energy as the temperature drop ismeasured during the reaction.
Ba(OH)2.8H2O (s) + 2 NH4SCN (s) --> Ba(SCN)2 (s) + 10 H2O (l) + 2 NH3 (g)
Synthesis
• Two or more simple substances combine to form a more complex substance• As two or more reactance yielding one product is another way to identify a synthesis reaction
2Na + Cl2 --> 2NaCl
Decomposition
• This reaction has a more complex substance that breaks down into more simpler parts• Synthesis and decomposition are opposite reaction
2 NaHCO3 --> NaCO3 + H2O + CO2
Single Replacement
• Single uncombined element • Two reactants yeild to or more products
Zn + 2HCl --> ZnCl2 + H2
Double Replacement
• Two compounds switch places to form a new compound.• Two reactants yield two products
BaCl2 + Na2SO4 --> BaSO4 + 2NaCl
Combustion
• A chemicals that involve oxygen and produces energy( heat) so rapidly that flames are shown.• Is a reaction that includes oxygen dioxide and water.
2Mg + O2 --> 2MgO