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Guilherme Mazui

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What is the Difference Between Isobaric and Isochoric Process?

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The main difference between isobaric and isochoric processes lies in the factors that remain constant during the process. Both processes are thermodynamic, but they involve different constraints:

  • Isobaric Process: In an isobaric process, the pressure of the system remains constant, while the volume and temperature change. This process occurs under constant pressure, and the system keeps the pressure constant by allowing the volume to change, either through expansion or contraction. The internal energy (U) typically changes in an isobaric process.
  • Isochoric Process: In an isochoric process, the volume of the system remains constant, while the pressure and temperature change. This process takes place under constant volume, and the system maintains a constant volume while allowing pressure and temperature to change.

In summary:

  • An isobaric process occurs at constant pressure, with changes in volume and temperature.
  • An isochoric process occurs at constant volume, with changes in pressure and temperature.
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  • What is the Difference Between Isobaric and Isochoric Process?
  • Comparative Table: Isobaric vs Isochoric Process

    • Comparative Table: Isobaric vs Isochoric Process

    Here is a table comparing the differences between isobaric and isochoric processes:

    Process Definition Work Done Pressure Volume Temperature Applications
    Isobaric A process in which pressure remains constant while allowing changes in volume and temperature. W = P∆V, where W is work done, P is pressure, and ∆V is change in volume Held constant Allows changes Allows changes Examples include boiling water and the expansion of a gas in a conducting cylinder
    Isochoric A process in which volume is held constant, meaning no mechanical work is performed (W = 0). Zero Allows changes, may change depending on temperature changes Held constant Not applicable (constant temperature) Calorimetry, bomb calorimeters, and acoustics

    In summary, isobaric processes keep the pressure constant while allowing changes in volume and temperature, and work done is calculated as W = P∆V. On the other hand, isochoric processes have a constant volume, meaning no mechanical work is performed, and pressure may change depending on temperature changes.

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    Guilherme Mazui

    Guilherme Mazui is graduated in journalism from the Federal University of Minas Gerais (UFMG) and a master's degree in Communication from the University of São Paulo (USP). In addition, he has experience in advertising writing and has worked as a content editor in several companies.