Given the following, how do you calculate the mole fractions of water and alcohol in commercial vodka?
Commercial vodka is typically sold at a concentration of 40.0% alcohol by volume (ABV), which is equivalent to 31.2% by mass ethanol(#CH_3CH_2OH# ) in water. The vapor pressure of pure water and ethanol at 20 °C are 17.5 torr and 44.6 torr respectively.
Commercial vodka is typically sold at a concentration of 40.0% alcohol by volume (ABV), which is equivalent to 31.2% by mass ethanol(
1 Answer
Well, let's take a
Explanation:
And this represents a
And the
Now of course, in a binary solution,
And
The vapour pressure of each component in solution will be proportional to their mole fractions.......and the vapour pressure of the solution will be this sum.........
As is typical of the vapour of such solutions; by comparison to the vapour pressures of the pure solvents, the vapour is ENRICHED with respect to the MORE VOLATILE component, which here is ethanol.