In case of physical adsorption, the heat of adsorption is of the order of _____________ kcal/kg mole?
Correct answer: B. 1000
- A. 100
- B. 1000
- C. 10000
- D. 100000
Explanation
Physical adsorption involves weak van der Waals forces, so its heat is relatively low, commonly of the order of 1000 kcal per kg mole. Chemisorption has a much higher heat of adsorption, often around 10,000 kcal per kg mole.
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