Write differences between physisorption and chemisorption.

Explanation

### Differences between Physisorption and Chemisorption

1. **Nature of Bonds**:
- **Physisorption**: Involves weak van der Waals forces (physical bonds).
- **Chemisorption**: Involves strong chemical bonds.

2. **Heat of Adsorption**:
- **Physisorption**: The heat of adsorption is relatively low, typically in the range of 30 to 40 kJ/mol.
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