Chemistry AS AQA Unit 2 Particle Collisions

Made these notes for my year 12 summer exam to revise and read over. There are spelling mistakes in most of my files but due to the busy exam schedule I had no time to correct them (sorry).

Most files have more information than what is needed but I feel it helps you feel more confident walking into the exam if you have a greater knowledge background and may help when having to apply knowledge to questions. Good luck :)

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  • Created by: Chelcie
  • Created on: 02-09-13 13:36

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Particle collisions:
"Many collisions between molecules or other particles do not lead to reactions. They
either do not have enough energy or they are in the wrong orientation."

Increasing the concentration of a solution
If there are more particles in a given volume, collisions are more likely therefore the…

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No particles have zero energy
Most particles have intermediate
energies (around the peak of a
A few have very high energies
(the right side of the curve)
No upper limit
(Average energy is not the same
as most probable energy)

Most probable Average energy

The area under…

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HETEROGENEOUS CATALYSTS: Where the catalysts is in a different phase to the reactants- usually a
solid catalyst and liquid or gaseous reactants.

HOMOGENEOUS CATALYTS: Where catalyst and reactants are in the same phase.

Different phases are separated by a distinct boundary, for example, oil and water form two
separate liquid…


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