Explain the difference between physisorption and chemisorption — JEE Chemistry
Explain the difference between physisorption and chemisorption.
1 Answer
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· 2mo ago
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| Property | Physisorption | Chemisorption |
|---|---|---|
| Force | van der Waals | Chemical bonds |
| $\Delta H_{ads}$ | Low (20–40 kJ/mol) | High (40–400 kJ/mol) |
| Reversibility | Reversible | Often irreversible |
| Temperature | Favoured at low T | Favoured at high T |
| Layers | Multi-layer | Mono-layer |
| Specificity | Non-specific | Specific |
$$Chemisorption has higher enthalpy and forms chemical bonds; physisorption is van der Waals$$
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Discussion (3)
AS
Why do we take the positive value only in the last step?
RJ
Saved me before my mock test. Much clearer than my coaching notes.
VC
Pro tip: memorise the standard result, it reappears in many problems.