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Chemistry - PowerPoint PPT Presentation


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Chemistry. The study of matter. Matter is stuff. Stuff is found in 4 different states: Solid Liquid Gas Plasma. Solids. Have a fixed shape and volume Particles maintain a specific position. Liquids. Have a fixed volume Take the shape of their container. Gases.

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chemistry

Chemistry

The study of matter

matter is stuff
Matter is stuff.
  • Stuff is found in 4 different states:
  • Solid
  • Liquid
  • Gas
  • Plasma
solids
Solids
  • Have a fixed shape and volume
  • Particles maintain a specific position
liquids
Liquids
  • Have a fixed volume
  • Take the shape of their container
gases
Gases
  • Have no fixed shape or volume
plasma
Plasma
  • Like gases, but ions get separated from their electrons
phase changes are physical changes
Phase changes are physical changes.
  • In a physical change, you change the shape or size of something, but it is still the same stuff.
  • In a chemical change, a substance is completely changed.
examples
Examples
  • http://www.bgfl.org/bgfl/custom/resources_ftp/client_ftp/ks3/science/changing_matter/index.htm
  • http://dli.taftcollege.edu/streams/geography/Animations/WaterPhases.html
  • http://www.dlt.ncssm.edu/tiger/chem4.htm
  • http://wps.prenhall.com/wps/media/objects/4974/5093961/emedia/ch11/AAEDKKP0.html
  • http://www.kentchemistry.com/links/Matter/HeatingCurve.htm
phase change math
Phase change math
  • Specific heat of liquid water = 4.186 joule/gram °C
  • Specific heat of ice = 2.09 J/g·°C
  • Specific heat of water vapor = 1.996 J/g°C
  • Heat of fusion = 334 J/g
  • Heat of vaporisation = 2260 J/g