If a volatile liquid is added to a sealed flask, the total pressure inside the flask is a sum of the air pressure and the vapor pressure of the liquid. Consider a flask at 298 K with an air pressure of 738 mmHg to which some n-butanol is added. If the measured pressure after the addition is 746 mmHg, what is the vapor pressure of n-butanol at 298 K

Explanation:

Total pressure inside flask = air pressure + vapour pressure of butanol

746 = 738 + vapour pressure of butanol

vapour pressure of butanol  = 8 mm Hg .

i believe it is c.) 1575 j.

i just calculated it all out, and not including weekends, and all the different days off. as of this school year (2018-2019) students are spending 2198 hours in school this year