Adiabatic process is a thermodynamic process in which no heat is transferred between a system and its surroundings. The system undergos the process of neither gains nor loses of heat to its surroundings. In scientific terms, the heat transfer is zero during the process. This does not mean the temperature must remain constant. Instead, the temperature, pressure, and volume of the substance can change because energy is transferred through work rather than heat. For example, when a gas is compressed rapidly, work is done on the gas, causing its temperature to rise even though no heat enters from outside. Conversely, when a gas expands rapidly, it does work on its surroundings and its temperature decreases.
During an adiabatic process, the energy transfer occurs only as work done on or by the system. The internal energy of the system changes due to the work done on or by the system, but there is no transfer of heat across the boundaries of the system.
