Gas evolution refers to the process where gases are produced during a chemical reaction. This can occur in various settings, such as in laboratories or natural environments. Common examples include the release of carbon dioxide (CO2) during fermentation or the production of hydrogen gas (H2) in certain chemical reactions. In many cases, gas evolution can be observed as bubbles forming in a liquid. This phenomenon is important in fields like chemistry and environmental science, as it helps scientists understand reaction mechanisms and the behavior of substances. Monitoring gas evolution can also provide insights into the efficiency of reactions and the properties of materials involved.