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 chemical bonding. The interaction is reversible, meaning that the adsorbed molecules can easily detach from the surface. In physisorption, the amount of gas or liquid that can be adsorbed depends on factors like temperature, pressure, and the nature of the surface. Common applications include gas storage and separation, where materials like activated carbon or zeolites are used to capture and hold gases efficiently.