College Physics III – Thermodynamics, Electricity, and Magnetism

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PV diagram

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College Physics III – Thermodynamics, Electricity, and Magnetism

Definition

A pV diagram is a graphical representation of the relationship between pressure (p) and volume (V) for a given system. It is commonly used to illustrate processes involving ideal gases.

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5 Must Know Facts For Your Next Test

  1. In a pV diagram, isothermal processes appear as hyperbolic curves.
  2. An isobaric process appears as a horizontal line on a pV diagram.
  3. The area under the curve in a pV diagram represents the work done by or on the gas.
  4. Isometric (isochoric) processes are represented by vertical lines in a pV diagram.
  5. The cyclic process in a pV diagram can represent different thermodynamic cycles like the Carnot cycle.

Review Questions

  • What does the area under the curve in a pV diagram represent?
  • How is an isothermal process depicted on a pV diagram?
  • Describe how an isochoric process would appear on a pV diagram.

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