Thermodynamic Work: Find w P, V, T Not Constants

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    Thermodynamic Work
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SUMMARY

The discussion focuses on calculating thermodynamic work (W) using the equation dw = P dv when pressure (P), volume (V), and temperature (T) are not constants. It emphasizes the necessity of expressing pressure as a function of volume before evaluating the integral W = ∫ P dV. The mention of the derivative dp/dv being constant suggests a specific relationship that simplifies the integration process.

PREREQUISITES
  • Understanding of thermodynamic principles, specifically work and energy.
  • Familiarity with calculus, particularly integration techniques.
  • Knowledge of the ideal gas law and its implications on P, V, and T relationships.
  • Experience with differential equations in the context of thermodynamics.
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  • Research how to express pressure as a function of volume in non-constant scenarios.
  • Study the implications of the ideal gas law on thermodynamic processes.
  • Learn about integrating functions in thermodynamics, focusing on variable pressure and volume.
  • Explore the concept of partial derivatives in thermodynamic equations.
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Students and professionals in physics and engineering, particularly those studying thermodynamics and fluid mechanics, will benefit from this discussion.

thejinx0r
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Hi,

How can I find the thermodynamic work from
dw=Pdv

if P, Vand T are not constants?
what if I knew that dp/dv is a constant in this case?
 
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You need to express P as a function of V first. Then you can evaluate the integral,

W = ∫ P dV
 

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