The surface area of a solid material plays a crucial role in the adsorption of gases onto solid surfaces in surface chemistry. Adsorption is a surface phenomenon where gas molecules accumulate on the surface of a solid material due to attractive forces between the gas molecules and the solid surface. The greater the surface area of the solid, the more sites are available for gas molecules to adsorb, leading to increased adsorption.Experimental evidence supporting the relationship between surface area and adsorption can be found in various studies, such as those involving the use of activated carbon, zeolites, and metal-organic frameworks MOFs as adsorbents.1. Activated carbon: Activated carbon is a widely used adsorbent due to its high surface area and porous structure. In a study by Bandosz and Ania 2006 , the adsorption of various organic compounds onto activated carbons with different surface areas was investigated. The results showed that the adsorption capacity increased with the increase in the surface area of the activated carbon. This was attributed to the higher availability of adsorption sites on the activated carbon with a larger surface area.2. Zeolites: Zeolites are microporous aluminosilicate minerals that have a high surface area and are used as adsorbents for various gases. In a study by Cavenati et al. 2004 , the adsorption of carbon dioxide onto zeolites with different surface areas was investigated. The results showed that the adsorption capacity increased with the increase in the surface area of the zeolite. This was attributed to the higher availability of adsorption sites on the zeolite with a larger surface area.3. Metal-Organic Frameworks MOFs : MOFs are a class of porous materials with high surface areas and tunable pore sizes, making them suitable for gas adsorption applications. In a study by Furukawa et al. 2010 , the adsorption of hydrogen onto MOFs with different surface areas was investigated. The results showed that the adsorption capacity increased with the increase in the surface area of the MOF. This was attributed to the higher availability of adsorption sites on the MOF with a larger surface area.In conclusion, the surface area of a solid material has a significant impact on the adsorption of gases onto solid surfaces in surface chemistry. Experimental evidence from studies involving activated carbon, zeolites, and MOFs supports this relationship, showing that the adsorption capacity increases with the increase in the surface area of the adsorbent. This is due to the higher availability of adsorption sites on materials with larger surface areas, allowing for more gas molecules to be adsorbed.