Math 2.0

Classical thermodynamics, heat transfer Definition

Isochoric process

Builds on Thermodynamic workHeatInternal energy

Definition

A process of a closed thermodynamic system is isochoric if the volume of the system is the same at all times of the process.

Remarks

If only pressure-volume work is possible, an isochoric process has W=0W = 0. So the heat absorbed equals the change of internal energy: Q=ΔUQ = \Delta U. For an ideal gas, an isochoric process satisfies p/Tp / T constant, where TT is the thermodynamic temperature. Heating a gas in a cylinder with a free piston is not isochoric: the piston moves out and the volume grows.

Reading path

To understand this page from the ground up, read these 4 pages in order. The foundations come first.

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Heat, concept, no evidence levelHeatconceptInternal energy, concept, no evidence levelInternal energyconceptThermodynamic work, concept, no evidence levelThermodynamic workconceptIsochoric process, definition, no evidence levelIsochoric processdefinition
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  1. Heat concept
  2. Internal energy concept
  3. Thermodynamic work concept
  4. Isochoric process definition

Further reading

  1. Web https://en.wikipedia.org/wiki/Isochoric_process
About this page
TagT79GATB8GN
URIm2://T79GATB8GN
Kinddefinition
WritingW0 stub
MSC80A05, 80A10
DefinesIsochoric process
UsesThermodynamic work, Heat, Internal energy
Changed3 November 2026

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