Tuesday, 5 July 2011

Types of Chemical Reactions

                                                      Types of Chemical Reactions
  1. Synthesis reaction: involves two or more substance to form another single substance. It releases energy.    ex: A + B -> AB
  2. Decompostion reaction: is the opposite of the synthesis reaction in which the reactants are broken down into 2 or more substances. This reaction needs energy or heat to take place.                            ex : AB + heat-> A+B
  3. Single Displacement Reaction: An element replaced another element in a compound. Note that not alll elements can be replaced by other ones. ex: A +BC -> AB+C
  4.  Double replacement reaction: In this reaction cations from two different ionic compound trade or switch places. ex AB + CB -> AD+ BC.  



Questions:
  1. How many types of Chemical Reactions are there?
  2. Give example about each type of Chemical reactions?
  3. All the types requires energy except which one?
References: 
Yaghi, M. (1999). Chemistry. Lebanese Educational Publishing Company s.a.l.
Costello, K. (2006). ChemistryLand Nucleus.Retrieved July 05, 2011, from http://www.chemistryland.com/CHM151/chm151home.html
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4 comments:

  1. Alaa Awwad19 July 2011 at 08:44

    1- All chemical reactions can be placed into one of six categories. Here they are, in no particular order:
    Combustion ,Synthesis ,Decomposition, Single displacement, Double displacement , and Acid-base

    ReplyDelete
  2. 7ala19 July 2011 at 23:36

    3. All types of reactions require energy except synthesis reaction where it releases energy.

    ReplyDelete
  3. Mohammad Abbass20 July 2011 at 03:09

    2- Combustion : C10H8 + 12 O2 ---> 10 CO2 + 4 H2O

    Synthesis: 8 Fe + S8 ---> 8 FeS

    Decomposition : 2 H2O ---> 2 H2 + O2

    Single displacement: Mg + 2 H2O ---> Mg(OH)2 + H2

    Double displacement : Pb(NO3)2 + 2 KI ---> PbI2 + 2 KNO3

    Acid-Base: HBr + NaOH ---> NaBr + H2O

    ReplyDelete
  4. Ghinwa Darwiche28 July 2011 at 15:03

    3- synthesis reactions are one of the chemical reactions that release energy rather than consume it in the process of the reaction.

    ReplyDelete

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