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What is the range heat of physisorption? |
10-20 kJmol-1 20-40 kJmol-1 40-200 kJmol-1 200-400 kJmol-1 |
20-40 kJmol-1 |
The heat of physisorption lie in the range of 20 to 40 kJ/mol. The value is small as weak van der waals forces are involved. It has negative sign as the adsorption is an exothermic reaction. |
