text: The following processes are often used to describe different stages of a thermodynamic cycle:
  *Adiabatic : No energy transfer as heat (Q) during that part of the cycle (). Energy transfer is considered as work done by the system only.
  *Isothermal : The process is at a constant temperature during that part of the cycle (T=constant, ). Energy transfer is considered as heat removed from or work done by the system.
  *Isobaric : Pressure in that part of the cycle will remain constant. (P=constant, ). Energy transfer is considered as heat removed from or work done by the system.
  *Isochoric : The process is constant volume (V=constant, ). Energy transfer is considered as heat removed from the system, as the work done by the system is zero.
  *Isentropic : The process is one of constant entropy (S=constant, ). It is adiabatic (no heat nor mass exchange) and reversible.
  *Isenthalpic : The process that proceeds without any change in enthalpy or specific enthalpy.
  *Polytropic : The process that obeys the relation .
  *Reversible : The process where the net entropy production is zero; .