adiabatic warming definition
A thermodynamic process in which the system undergoing the change exchanges no heat with its surroundings. An increase in entropy or degree of disorder occurs during an irreversible adiabatic process. However, reversible adiabatic processes are isentropic; that is, they take place with no change in entropy. The definition of adiabatic is occurring without gain or loss of heat. So there is no such thing as adiabatic cooling or adiabatic heating. [edit] The way the OP was worded, it implies the addition or removal of heat-adiabatic cooling and heating is a temperature change without the addition or removal of heat. [/edit]. Dry Adiabatic Process-more accurately called an unsaturated adiabatic process, is one in which the vertical displacement of an air parcel lead to no changes of phase. Note that a dry adiabatic process also describes moist air parcel motions, so long as the air remains unsaturated. The expansion results in a cooling of the air mass. With adiabatic heating, as a mass of air descends in the atmospheres it does when it moves downslope from a mountain rangehe air encounters increasing atmospheric pressure. In adiabatic cooling, when a mass of air risess it does when it moves upslope against a mountain ranget encounters decreasing atmospheric pressure with increasing elevation. The air mass expands until it reaches pressure equilibrium with the external environment. Adiabatic Process. a process, occurring in a physical system, in which no heat is exchanged with the surroundings. An adiabatic process can occur in a system surrounded by a heat-insulating (adiabatic) enclosure. Adiabatic cooling happens as air mass expands with increasing elevation (because density of gases decreases farther into the atmosphere). As elevation increases, the air gets cooler because energy is drawn from the surroundings. Less dense air traps less heat resulting in this net cooling called adiabatic cooling. Adiabatic Processes in the Atmosphere. The traditional definition of an adiabatic process is one in which heat is neither added to nor removed from the system. In the atmosphere, the system is an air parcel. This definition is patently incorrect because heat is not a quantity, but rather a process of energy transfer. The correct definition of an adiabatic process is one in which the system does not exchange energy with its surroundings by virtue of the temperature difference between them. Adiabatic heating and cooling is common in convective atmospheric currents. In adiabatic heating and cooling there is no net transfer of mass or thermal exchange between the system (e.g., volume of air) the external or surrounding environment. An adiabatic process can be either reversible or irreversible. In the case of the reversible adiabatic process, the entropy of the system remains constant. A reversible adiabatic process is therefore called isoentropic. On a phase diagram of the system it is represented by an adiabatic curve or by an isoentropic curve. In an irreversible adiabatic process the entropy increases.
A process, occurring in a physical system, in which no heat is exchanged with the surroundings.