29. According to the state diagram constructed in the coordinates temperature - composition of the system water (A) - propyl alcohol (B) (Fig. 13), determine: Diagram "boiling point - composition" of the system water -
propyl alcohol
1. What type does this system belong to, what laws are applicable to such systems?
2. At what temperature will a liquid containing 80% alcohol and 20% water boil, and what composition does steam form?
3. What phases are in a system containing 80% alcohol and 20% water at 93 °C and what degrees of freedom does the system have under these conditions?
4. What is the name of the composition containing 45% alcohol and 55% water at 87 ° C, what properties does it have?
5. By what methods can a mixture of the composition indicated in paragraph 4 be separated into alcohol and water?
6. What will be the composition of the liquid and vapor phases during the distillation of a system consisting of 20% alcohol and 80% water?

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