Example of an Isochoric Process

The Isochoric Process is an idealized thermodynamic process, which defines how the states of an ideal gas can withstand changes. Describe the behavior of gas in a closed container at an invariable volume.

The isochoric process is also known as the isometric or isovolumic process. The relationship between temperature and pressure maintains a constant value.

This can be better understood with the ideal gas law:

  • PV = nRT
  • P is the absolute gas pressure
  • V is the volume
  • n is the amount of gas
  • R is the ideal gas constant that is valued at (8.31 J / mol K)
  • T is the temperature.
  • When the volume is constant, this law can be readjusted to express the relationship of Pressure to Temperature.
  • This mathematical expression between temperature and pressure is known as Gay-Lussac’s Law, thus known, by the French chemist who devised it during the 19th century.

5 Examples of an Isochoric Process

  1. Isochoric processes in a pressure cooker:  When a pot is hermetically covered, the interior volume does not usually change, so when heat is added, both the pressure and the temperature increase rapidly.
  2. Isochoric processes in heat engines : Heat engines are devices that take advantage of heat transfer to perform some type of work. They use a cyclical system to transform the thermal energy that is added to them into mechanical or moving energy. Examples of this type are steam turbines and car engines.
  3. The Otto cycle:  It is a type of thermodynamic cycle in car engines that performs the heat transfer procedure when it is turned on.
  4. Isobaric process: This happens at constant pressure and is prevalent in many real-life examples, such as lighting a match.
  5. Isothermal process : originates at constant temperature. For example, in a phase change, such as boiling water.
  6. Adiabatic process: There is no heat or material exchange when a gas or fluid alters its volume.

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