The Sidney Young equation is used to correct values of this quantity based on changes in pressure. Various values of this quantity form the two axes of a Dühring plot. Mole fractions for the substance with a smaller value of this quantity define the axes of a McCabe–Thiele plot. By reducing pressure, (-5[1])a rotovap lowers (-5[1])the value (10[1])of this quantity (10[3]-5[1])for (10[1])the solvent (10[2])in the flask. (10[1]-5[2])Negative (10[3])azeotropes have a higher (-5[1])value (10[1])of this (10[1])quantity (10[2])than either of their components, (10[2])and hence cannot be separated (10[1])by simple distillation. (10[8])The (10[1])ebullioscopic (10[1])constant times molality (-5[1])times van (10[1])’t Hoff factor calculates a colligative property known as (10[1])this quantity’s namesake “elevation.” (10[1])For 10 points, (10[1])name this quantity of a substance at which vapor pressure (10[2])equals (10[1])surrounding pressure, (-5[1])causing it to vaporize. (10[1])■END■ (10[6]0[2])