An isentropic process is a thermodynamic process that occurs at constant entropy, meaning that there is no heat transfer into or out of the system and no irreversibilities. In this type of process, the energy is conserved, and changes in pressure and temperature occur due to the conversion of potential and kinetic energy. Isentropic processes are significant for understanding adiabatic processes and are commonly used in atmospheric physics to describe the behavior of air parcels as they move through the atmosphere.
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