This when the catalyst is in a different phase to the reactants. E.G. Solid catalyst with liquid/gaseous reactants.
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What is an Homogeneous catalyst?
This is when a catalyst is in the same phase as the reactants.
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What is a catalytic converter?
A catalytic converter is found in a car, uses a platinum-iridium catalyst to oxidize pollutants and carbon monoxide into carbon dioxide and water; an antipollution device on an automotive exhaust system.
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What shape is the catalytic converter and what is it made of?
Honeycomb and it is made out of ceramic material coated with Rhodium and platinnum metals.
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Why in the form of a Honeycomb?
The honeycomb shape creates a big surface area fo the reaction to occur .
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What happens inside a catalytic converter?
As the pollutants pass over the catalyst, they form less harmful products.
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How does the catalytic converter create these less harmful products?
1) Adsorption 2)Desorption
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What is adsorption?
Adsorption is when the initial gases taken in by the converter form weak bonds with the metal atoms of the catalyst. This holds the gases in the right position for them to react together.The gases then react on the surface.
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What is desorption?
This is when the products then break away from the metal atoms.This frees up room on the surface for more gases to react on the surface. The weak bonds-have to be strong to hold gases & weak enough to release products easily.
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Other cards in this set
Card 2
Front
What is an Homogeneous catalyst?
Back
This is when a catalyst is in the same phase as the reactants.
Card 3
Front
What is a catalytic converter?
Back
Card 4
Front
What shape is the catalytic converter and what is it made of?
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