If I boil a mixture of ethanol and water (50/50)?

Question

what boiling point will I first record? A mix of both or the same as ethanol?

Answer 1

What you need is a phase diagram for the ethanol-water mixture:

http://puccini.che.pitt.edu/~karlj/Class... vs x,y –      Saturated Liquid and Vapor Plot

From this plot, you can see that the first appearance of boiling will occur at 80 degrees C.