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Enthalpy (Read 1955 times)
Gerrit-Jan Linker
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Enthalpy
09.04.09 at 09:50:19
 
Enthalpy
 
Enthalpy (H) is a thermodynamic property of a thermodynamic system. It is used to calculate the heat transfer during a quasistatic process taking place in a closed thermodynamic system under constant pressure (isobaric process).  
 
For quasistatic processes under constant pressure, the change in enthalpy ΔH is equal to the change in the internal energy of the system, plus the work that the system has done on its surroundings. This means that the change in enthalpy under such conditions is the heat absorbed by a chemical reaction.
 
The change in enthalpy ΔH of a system is equal to the release or absorption of heat by a system at constant pressure.
 
H = U + pV
  H = Enthanpy  
  U = Internal energy
  p = pressure
  V = Volume  
 
Source:
General Chemistry, Atkins, Beran
Enthalpy - Wikipedia
http://en.wikipedia.org/wiki/Enthalpy
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« Last Edit: 25.04.10 at 18:55:10 by Gerrit-Jan Linker »  

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