Why we use enthelpy when we calculate latent heat?

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SUMMARY

Enthalpy (h) is utilized instead of internal energy (u) when calculating latent heat due to the accompanying volume change during phase transitions, which involves pV work. This distinction is crucial for accurate thermodynamic calculations. Understanding the role of enthalpy in phase changes is essential for fields such as chemistry and engineering.

PREREQUISITES
  • Understanding of thermodynamic concepts, specifically phase changes
  • Familiarity with the first law of thermodynamics
  • Knowledge of pV work and its implications in energy calculations
  • Basic grasp of enthalpy and internal energy definitions
NEXT STEPS
  • Research the relationship between enthalpy and internal energy in thermodynamics
  • Study the implications of pV work during phase transitions
  • Explore practical applications of latent heat in engineering
  • Learn about the calculation methods for enthalpy changes in different substances
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Chemists, engineers, and students studying thermodynamics who seek to deepen their understanding of phase changes and energy calculations.

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Why we use enthalpy(h) instead of internal energy(u) when we consider latent heat?
 
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Because a phase change is generally accompanied by a volume change and therefore involves pV work as well.

[edit] I notive you haven't had the customary

Hello seungwoo, :welcome:

So here it is, albeit belated !
 
Last edited:

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