0.1 Enthalpy of Mixtures1additio30.1 Enthalpy of MixturesThe enthalpy of a mixture is determined using an equation of state by combining the departurefunction for the mixture with the enthalpy of an ideal gas mixture0.1where the first term on the right side represents the enthalpy departure given by Eqn. 7.24 or Eqn7.31. For the Peng-Robinson equation, the departure formula has been calculated in Example 7.3.The equation of state parameters depend on composition as provided by Eqn. 10.9. The summationof the ideal gas enthalpies Eqn. 0.1 is easily calculated after selecting a reference state for eachcomponent. For a fluid that is not an ideal gas at the reference state0.2Each component may have a different reference state temperature, pressure and state of aggrega-
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