« previous next »

Author Question: At 99, the vapor pressure of water is 733 mm Hg. (a) At standard atmospheric pressure, what is the ... (Read 42 times)

acc299

  • Hero Member
  • *****
  • Posts: 569
on: Aug 23, 2018

At 99, the vapor pressure of water is 733 mm Hg.
  (a) At standard atmospheric pressure, what is the vapor pressure of a compound being
  steam-distilled at this temperature?
  (b) If the compound has a molecular weight of 180, how much water is required to distill 1.0 g
  of the compound?



Question 2

Suggest a reason why benzene steam-distills at the rate of 1 g/0.1 g H2O, but nitrobenzene dis
  tills at the rate of 1 g/4 g H2O.



abctaiwan

  • Sr. Member
  • ****
  • Posts: 355
Reply #1 on: Aug 23, 2018
Answer to Question 1

(a) Ptotal = P A + P B
If P A (water) is 733 mm and Ptotal is 760, then P B (the compound being distilled) is (760
733) or 27 mm.
(b) (wtA/wtB) = (P A/P B) x (MWA/MWB)
wtA = 1.0 x (733/27) x (18/180) = 2.7 g of water



Answer to Question 2

Benzene is more volatile (bp 80) than is nitrobenzene (bp 210).


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.

Did you know?

Approximately 25% of all reported medication errors result from some kind of name confusion.

Did you know?

Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.

Did you know?

There used to be a metric calendar, as well as metric clocks. The metric calendar, or "French Republican Calendar" divided the year into 12 months, but each month was divided into three 10-day weeks. Each day had 10 decimal hours. Each hour had 100 decimal minutes. Due to lack of popularity, the metric clocks and calendars were ended in 1795, three years after they had been first marketed.

Did you know?

The first successful kidney transplant was performed in 1954 and occurred in Boston. A kidney from an identical twin was transplanted into his dying brother's body and was not rejected because it did not appear foreign to his body.

Spanish water dog (Perro de agua español). Spanish water dog (Perro de agua español).
To increase pressure using body weight, lean on your client. To increase pressure using body weight, lean on your client.
A hole in the muffler allows condensed water to escape. A hole in the muffler allows condensed water to escape.
Major three factors of blood pressure. Major three factors of blood pressure.
Vapor density. The top drawing illustrates the movement of a gas with a vapor density less than 1; ... Vapor density. The top drawing illustrates the movement of a gas with a vapor density less than 1; ...
5-4 The relationship between vapor pressure and temperature—in this case for water. As the ... 5-4 The relationship between vapor pressure and temperature—in this case for water. As the ...
Video: Simple and Double Sugar

For a complete list of videos, visit our video library