Condensing is the process where a substance changes from a gas to a liquid. This typically occurs when the gas is cooled or compressed, causing its molecules to lose energy and come closer together. An everyday example of condensing is when water vapor in the air forms droplets on a cold glass. In the context of science, condensing is important in various applications, such as in refrigeration systems and steam engines. In these systems, the condensation of gases helps to transfer heat and maintain efficient operation. Understanding this process is crucial for fields like meteorology and engineering.