What happen in Adiabatic Change

In an adiabatic change, a thermodynamic process occurs without any heat exchange between the system and its surroundings, meaning the heat remains unchanged. This is achieved by perfectly insulating the system. Despite no heat transfer, the temperature of the system can change as a result of work being done on or by the system. For example, in an adiabatic expansion, the system does work on the surroundings, leading to a decrease in temperature, while in adiabatic compression, work is done on the system, causing an increase in temperature. This principle is crucial in understanding processes like the expansion of gases in engines or atmospheric phenomena. The conservation of energy still applies, but the energy change manifests solely as changes in internal energy, not heat transfer. Therefore, in an adiabatic change, the correct answer is [A] Heat remains unchanged.