Catalysts speed up chemical reactions by lowering the activation energy required for both the forward and reverse reactions. Catalysts do this by changing the reaction pathway to one that requires less energy. They remain unchanged at the end of the reaction. Catalysts are important in many areas of life, such as in the Haber process for manufacturing ammonia which uses an iron catalyst. Enzymes are biological catalysts that are denatured and lose their catalytic properties at high temperatures due to changes in their protein structure.

1. H.W
CATALYSTS
SIR BILAL
CHEMISTRY
Mohammad Ibrahim

2. Catalysts
Catalysts are substances which speed up
chemical reactions.At the end of the
reaction,the catalyst is left unchanged.
substances which speed up chemical reaction

3. Catalysts lower the activation energy
for both forward and reverse
reactionS.They are very important for
every segment in our life.

4. This means , the catalyst changes
the reaction path by lowering its
activation energy and the catalyst
increases the rate of reaction. Here is a picture demonstrating this.

5. EXAMPLES
This picture shows an example
of an uncatalyzed pathway and a
catalyzed pathway.The
uncatalyzed pathway,as
demonstrated in the picture,has
far more energy than the
catalyzed pathway.

6. Here is another picture
showing an uncatalyzed
substance and a catalyzed
substance.
clearly,the uncatalyzed
substance requires more
energy than the catalyzed
one.

7. Catalysts make it easier for
particles to react.
With a catalyst,a lot more
particles have enough energy
to react.

9. For example,Iron catalyst is used in manufacturing
ammonia(Haber process)
IRON(Fe)
AMMONIA (NH3)

10. ENZYMES
Enzymes are biological
catalysts.An enzyme is a
large protein molecule.

11. ENZYMES DON’T WORK AT HIGH TEMPERATURES.
THEIR SHAPES CHANGE AT HIGH TEMPERATURES
AND THEY BECOMES DENATURED.
ENYMES DURING
DIFFERENT
TEMPERATURES!

12. AND THAT’S
EVERYTHING,THANK YOU!
HOPE YOU ENJOYED THE
CONTENT!
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