Here’s a explanation:
Physical Adsorption (Physisorption):
- Molecules stick to the surface weakly.
- Happens due to weak forces.
- Can be reversed easily.
- Works better at low temperatures.
- Example: Oxygen sticking to charcoal.
Chemical Adsorption (Chemisorption):
- Molecules stick to the surface strongly by forming a chemical bond.
- Usually cannot be reversed.
- Works better at high temperatures.
- Example: Hydrogen sticking to a metal surface in catalysis.
Simple idea:
- Physisorption = weak sticking
- Chemisorption = strong sticking (chemical bond)