Physisorption is a type of adsorption where molecules adhere to a surface through weak van der Waals forces. This process occurs at relatively low temperatures and does not involve any significant chemical bonding. As a result, the adsorbed molecules can easily be removed by increasing the temperature or reducing the pressure. In physisorption, the interaction between the adsorbate and the surface is generally reversible. This means that the molecules can be released without altering their chemical structure. This property makes physisorption useful in various applications, including gas storage, catalysis, and separation processes.