Article Rewrite Hi I am currently re writing this article so it makes more sense and is more wikified I am doing this as a 10 step process while I complete this please leave comments on this page until I m done Thanks STEP 1 Definition COMPLETE STEP 2 Characteristics COMPLETE STEP 3 Macroscopic Properties COMPLETE STEP 4 Microscopic Properties NEEDS EXPANSION Its currently Stub like STEP 5 Gas Models COMPLETE STEP 6 Special Topics NEEDS EXPANSION Its currently Stub like STEP 7 History COMPLETE STEP 8 References COMPLETE STEP 9 Clean up COMPLETE STEP 10 Review THIS IS FOR OTHER WIKIPEDIANS TO DO