Read "Chemistry For You" Page 145
Catalyst - A catalyst is a substance that has the ability to change the rate of reaction
Why are catalysts used? - Catalysts are usually used in order to speed up reaction rates, they can also slow them down, for instance to postpone rusting.
Why are high temperatures needed? - High temperatures are needed for the amount of energy the molecules need to react, it also speeds up the rate of reaction.
What equipment is used during the process?
A boiling tube with a delivery tube with a test tube or reservoir and a basin of water.
What catalysts are used to convert long chain alkanes to alkenes and shorter chain molecules? - Silica or alumina. Video > A ceramic catalyst can be used (silicon)
How is the Gas collected?
Over water
What safety aspects are preformed during the experiment?
The gas will be collected over water, do not allowed suck-back of water ( it will turn into steam and cause and explosion)
What causes the cracking to occur?
Video > first you must heat the ceramic pot (catalyst) and then move the flame which will encourage the liquid paraffin to turn into a vapour and meet the catalyst, this causes the cracking to occur.
What is Cracking?
When the Long Chain gas molecules produce smaller chain gas molecules which will then be collected. (In the Video > triggered by ceramic catalyst)
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