wiz-icon
MyQuestionIcon
MyQuestionIcon
9
You visited us 9 times! Enjoying our articles? Unlock Full Access!
Question

What is catalysis? How is catalysis classified? Give two examples for each type of catalysis?

Open in App
Solution

Catalyst is a substance that changes the rate of a reaction and this phenomenon is called catalysis. A catalyst affect the rate of the reaction but itself remains unchanged in mass and properties at the end of the reaction.
Catalysis is classified into following two categories
(i) Homogeneous catalysis:
The physical state (phase) of the catalyst is same as the physical state of reagents.
2SO2(g)+O2(g)NO(g)−−−2SO3(g)
CH3COOCH3(l)+H2O(l)HCl(l)−−−CH3COOH(l)+CH3OH(l)
(ii) Heterogeneous catalysis:
The physical states (phases) of the catalyst reagents are different. Generally, the catalyst is in solid phase (powdered form) and the catalysis is called surface catalysis.
2SO2(g)+O2(g)Pt(s)−−2SO3(g)
N2(g)+3H2(g)Fe(s)−−2NH3(g)

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Types of Catalysis
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon