The boiling range issue during oil adjustment
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I would like to ask why when heavy aromatics with a final boiling point of 215 are added to gasoline with a final boiling point of 195 (in a quantity of only 5%), the resulting mixture has a final boiling point of 198 instead of around 215. What is the principle behind this? I thought that the heavy components of 215 would still distill out at around 215 degrees in gasoline.
I feel that the vapor pressure of the mixture has changed
The vapor pressure must have decreased, but not by much, right? Besides, does vapor pressure really have such a big impact on the boiling range?
The total pressure of the liquid decreases, resulting in a decrease in the partial pressures of its components, as per the ideal gas law.