The STS activity class of a school in the urban area visited Jiangyan Winery, and the students learned that liquor is the alcohol in fermented grains boiled and evaporated from distiller's grains.

(1) It is best to keep the boiling temperature of alcohol, that is, 78.5℃. At this time, alcohol is vaporized into steam, and other liquids such as water in the vaporization pool will not boil, so the purity of the produced wine is higher. The gas pipeline meanders through the condensation pool to expand the heat dissipation area, and lowering the temperature is beneficial to the liquefaction of gaseous alcohol.

(2) ① The volume of alcohol in 500 ml, 45-degree liquor is: V alcohol = 500 ml× 45 ml 100 ml = 225 ml = 225 cubic centimeters, and the volume of water is 500 ml -225 ml = 275 ml; = 275ml

② Alcohol content: m alcohol = ρ alcohol v alcohol = 0.8g/cm3× 225cm3 =180g;

The water content is: m water = ρ water v water =ρwater (v total -V alcohol) =1g/cm3× (500-225) cm3 = 275g.

Total mass: m=m water +m alcohol =275g+ 180g=455g,

∵455g