An adiabatic process is defined as a process in which there is no transfer of heat between the system and its surroundings (i.e., $q = 0$). This is typically achieved by insulating the system or by carrying out the process very rapidly so that there is no time for heat exchange.

• Isochoric process: Occurs at constant volume (${\Delta}V = 0$). Heat exchange can occur.
• Isothermal process: Occurs at constant temperature (${\Delta}T = 0$). Heat is usually exchanged to maintain the temperature.
• Isobaric process: Occurs at constant pressure (${\Delta}P = 0$). Heat exchange generally occurs.