Glycerin, #C_3H_8O_3#, is a nonvolatile liquid. What is the vapor pressure of a solution made by adding 164 g glycerin to 338 mL #H_2O# at 39.8°C?
The vapor pressure of pure water at 39.8°C is 54.74 torr and its density is .992 #g# #/# #cm^3# .
The vapor pressure of pure water at 39.8°C is 54.74 torr and its density is .992
1 Answer
The vapour pressure of the solution is proportional to the mole fraction of the volatile component...
Here...
Explanation:
And so the vapour pressure will be somewhat reduced with respect to PURE water...we calculate the mole fractions of each component...
I did this the long way, but of course we know that the SUM of the mole fractions in a BINARY solution is UNITY...i.e.
And so
As is typical for aqueous solutions...