The evolution of gas can affect catalysis in several ways:
1. Reaction Rate: The formation of gas bubbles can increase the surface area for the reaction, potentially enhancing the reaction rate. 2. Heat Transfer: Gas evolution can help in dissipating heat generated during exothermic reactions, thus maintaining the optimal temperature for catalysis. 3. Mass Transfer: The removal of gas products can improve the mass transfer of reactants to the catalytic sites, thereby increasing the efficiency.