1 / 8

Chemical Reactions

Chemical Reactions. OGT. Matter. In chemical reactions - matter cannot be destroyed In chemical reactions - matter cannot be created ________________________________________________ 1 st Law of Thermodynamics Energy can be changed from one form to another,

moya
Download Presentation

Chemical Reactions

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Chemical Reactions OGT

  2. Matter • In chemical reactions - matter cannot be destroyed • In chemical reactions - matter cannot be created ________________________________________________ 1st Law of Thermodynamics Energy can be changed from one form to another, but it cannot be created or destroyed. ________________________________________________ • In chemical reactions matter is changed

  3. Organizing Reactions With so many chemical reactions, scientists have found it useful to classify them into five general types: 1. Synthesis 2. Decomposition 3. Single Replacement 4. Double Replacement 5. Combustion

  4. Synthesis • Synthesis reactions involve two or more substances which combine to make a more complex substance • They look like this: A + B  AB H2 + O2 H2Ounbalanced C + O2 CO2unbalanced

  5. Decompositon • Decomposition reactions find one substance being broken down into two or more simpler substances • This reaction is the opposite of a synthesis reaction • They look like this: AB  A + B H2O  H2 + O2unbalanced Ag2O  Ag + O2 unbalanced

  6. Single Replacement • This reaction occurs when an element trades places with another element • They look like this: A + BC  AC + B Mg + HCl  MgCl 2 + H2 unbalanced Cl2 + KBr KCl + Br2 unbalanced

  7. Double Replacement • Like dancing couples, compounds in this type of reaction just exchange partners • They look like this: AB + CD  AD + CB Pb(NO3)2 + KI  PbI2 + KNO3 unbalanced H2SO4 + NaOH  Na2SO4 + H2O unbalanced

  8. Combustion • These reactions occur when oxygen combines with some other compound to form H2O and CO2 C10H8 + O2H2O+CO2unbalanced C3H8 + O2 H2O + CO2unbalanced

More Related