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Question

How are Physisorption and temperature related?


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Solution

Physisorption and Temperature relationship

  1. Physisorption is also known as physical adsorption, gas is accumulated on the solid surface due to weak force, known as van der walls force.
  2. It is an exothermic process and its adsorption enthalpy is very low.
  3. Physisorption and temperature are inversely related to each other that is, physisorption decreases with increase in temperature.
  4. In an exothermic reaction in accordance with Le Chatelier's principle increasing the temperature will shift the equilibrium to the left, whereas decreasing the temperature will shift the equilibrium to the right.
  5. Hence, Physisorption is exothermic in nature, according to Le Chatelier's principle, it decreases with an increase in temperature which means Physisorption occurs more readily at lower temperature.

Therefore, Physisorption and temperature are inversely related to each other.


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