Temperature plays a significant role in the adsorption of gases on solid surfaces. Adsorption is a surface phenomenon where gas molecules accumulate on the surface of a solid material. The effect of temperature on adsorption can be understood by examining the two types of adsorption: physisorption and chemisorption.1. Physisorption: In this type of adsorption, gas molecules are held to the solid surface by weak van der Waals forces. The adsorption process is exothermic, meaning it releases heat. As the temperature increases, the kinetic energy of the gas molecules also increases, which weakens the van der Waals forces between the gas molecules and the solid surface. Consequently, the adsorption capacity of the solid decreases with increasing temperature. This behavior is in accordance with the Langmuir adsorption isotherm and can be observed in the adsorption of nitrogen gas on activated carbon.2. Chemisorption: In chemisorption, gas molecules form chemical bonds with the solid surface, resulting in a stronger interaction compared to physisorption. The adsorption process is also exothermic, but the effect of temperature is more complex. At low temperatures, the adsorption capacity is limited because the gas molecules do not have enough energy to overcome the activation energy barrier required to form chemical bonds with the solid surface. As the temperature increases, the adsorption capacity also increases because more gas molecules have sufficient energy to form chemical bonds. However, at very high temperatures, the adsorption capacity may decrease due to the desorption of gas molecules from the solid surface. This behavior is in accordance with the Temkin adsorption isotherm and can be observed in the adsorption of hydrogen gas on metal surfaces, such as palladium.In summary, the effect of temperature on the adsorption of gases on solid surfaces depends on the type of adsorption. For physisorption, the adsorption capacity generally decreases with increasing temperature, while for chemisorption, the adsorption capacity initially increases with temperature and then decreases at very high temperatures. The specific temperature dependence of adsorption can be described by adsorption isotherms, such as the Langmuir and Temkin isotherms, which are widely used in the literature to model and predict adsorption behavior.