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Question: the molar enthalpy of a binary liquid mixtures of species...

Question details

The molar enthalpy of a binary liquid mixtures of species 1 and 2 is given by:

                        h [J/Mole] = 1500 X1 + 800 X2 + (25 X1 + 35 X2 - 11.86X1X2) T

Where T is the temperature in 0K. This relationship is valid in the temperature range from 2800K to 3600K.

  1. You wish to dilute and cool a process stream containing 50 mole% of species 1 and 50 mole% of species 2. Consider the adiabatic mixing of a stream α (containing 50 mole% of species 1 and 50 mole% of species 2) with a molar flow rate of 2 mole/sec at 750C and 1 bar with a stream β of pure species 1 flowing at rate of 3 mole/sec at 200C and 1 bar. What is the exit temperature of the outlet stream? You may assume steady state.              ͟ ͟
  2. What is the partial molar enthalpy of species 1, H1, in stream α?    ͟͟ ͟
  3. What is the partial molar enthalpy of species 1 at infinite dilution, H1, at 750C?
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