QuestionQuestion

1. A mixture with the total composition given below is at equilibrium at 200°F and 400 psia.
Calculate the compositions of the gas and liquid. (Hint: Follow the example 12-4)
Component          Composition
                            Mole percent
Propane                        0.65
n-Butane                      0.30
n-Pentane                     0.05
                              ̅ ̅ ̅ ̅ ̅ ̅ ̅ ̅ ̅ ̅ ̅ ̅ ̅ ̅ ̅ ̅ ̅ ̅ ̅ ̅ ̅
                                        1

2. Calculate the bubble-point pressure of the following mixture at 140°F. First assume the ideal-solution behavior (example 12-2). Then, find the bubble-point of a real liquid (example 12-6).
Component            Composition
                              Mole percent
Propane                        0.02
n-Butane                      0.40
n-Pentane                     0.15
n-Hexane                      0.30
n-Heptane                     0.13
                                 ̅ ̅ ̅ ̅ ̅ ̅ ̅ ̅ ̅ ̅ ̅ ̅ ̅ ̅ ̅ ̅ ̅
                                        1

3. Calculate the dew-point pressure of the mixture in Problem 2 at 140°F. First assume the ideal-solution behavior (example 12-3). Then, find the dew-point of a real liquid (example 12-7).

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