Which of the following compounds has the highest vapor pressure at 25°C?
A. CH3CH2OH
B. CH3OCH3
C. CH3CH2CH2Cl
D. CH3CH2CH3
E. CH3CH2CH2CH
2 answers
Generally, increased molar mass increases boiling point and decreases vapor pressure. Therefore, the highest vapor pressure should be due to the molecule with the lowest molar mass.
Also, look at hydrogen bonding if the molar mass is the same or close to the same.
2 answers