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Illustration Isobaric, Isochoric, Isothermal and Adiabatic Process on the p-V Diagram

Isobaric, Isochoric, Isothermal and Adiabatic Process on the p-V Diagram
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Four different processes plotted in a pressure-volume diagram:

  • isobaric - Pressure \( \mathit{\Pi} \) remains constant during this process. For example, such a process can be an expansion of the gas, which results in the change of volume.
  • isochoric - Volume \( V \) remains constant during this process.
  • isothermal - Temperature \( T \) remains constant during this process.
  • adiabatic - There is no heat exchange of the system with the environment during this process. Consequently, the system must be isolated to be adiabatic! The entropy remains constant thereby.