Final answer:
Surface condensers are more commonly used in condensation processes.
Step-by-step explanation:
In the context of condensation, the more common type of condenser is surface condenser. Surface condensers are commonly used in power plants and industrial applications to convert steam into water by cooling it on the surface of tubes or plates.
Contact condensers, on the other hand, are not as common. They work by bringing a vapor into direct contact with a cooled surface, causing it to condense.
So, in summary, surface condensers are the type of condenser that is more commonly used.