Solving Tds Equation: Unit Conversion for KJ/Kg

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SUMMARY

The discussion focuses on solving the Tds equation, specifically addressing the unit conversion required to express the result in kilojoules per kilogram (KJ/Kg). The equation Tds = dh - v dP is utilized, where the change in enthalpy (dh) is derived from integrating the term v dP. A key issue raised is the need to convert a value in kilopascals (kPa) to kilojoules per kilogram, emphasizing the importance of maintaining homogeneous units throughout the calculation.

PREREQUISITES
  • Understanding of thermodynamic equations, specifically the Tds equation.
  • Familiarity with unit conversions, particularly between kilopascals and kilojoules per kilogram.
  • Knowledge of integration techniques in thermodynamics.
  • Basic principles of enthalpy and entropy in thermodynamic processes.
NEXT STEPS
  • Study unit conversion techniques between pressure (kPa) and energy (KJ/Kg).
  • Learn about the application of the Tds equation in thermodynamic systems.
  • Explore integration methods for calculating changes in enthalpy and entropy.
  • Review examples of homogeneous unit systems in thermodynamic equations.
USEFUL FOR

Students and professionals in thermodynamics, particularly those working on energy calculations and unit conversions in engineering applications.

miked42
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Homework Statement


Tds equation

Homework Equations


Tds=dh-vdP


The Attempt at a Solution


i had to rearrange and use an integral for vdP to solve for enthalpy so I had the change in enthalpy is equal to the change in ehtropy multiplied by temprature plus a number in kPa from the integral.
Question is how do I add the number in Kilopascals to the number in Kilojoules/hilogram. I need a unit conversion of some sort cause the answer needs tobe in KJ/Kg
 
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how about posting your attempt so that we can see your approach. More than likely you made a mistake since all units should be homogeneous.
 

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