Tuesday, May 17, 2011

"5.13 describe how long-chain alkanes are converted to alkenes and shorter-chain alkanes by catalytic crackling, using silica or alumina as the catalyst and a temperature in the range of 600-700C"




3. A catalyst is a substance which speeds up a chemical reaction. At the end of the reaction, the catalyst is chemically unchanged. 
4. A catalyst is used so we can get more product in a certain time using a suitable catalyst.
5. To speed up reactions and break the bonds



Posted by at

1 comment:

  1. Brian TaylorMay 24, 2011 at 8:48 PM

    5.13 Q5 The high temperatures are needed to provide the energy to break the strong covalent bonds in the molecule, the fact that the rate increases in a bonus! Q4 A catalyst speeds up the rate of reaction. What about the other 8 questions?

    ReplyDelete

Subscribe to: Post Comments (Atom)