Posted by dave on .
The total pressure in a flask containing air and ethanol at 257C is 878 mm Hg. The pressure of the air in the flask at 257C is 762 mm Hg. If the flask is immersed in a water bath at 300C , the total pressure is 980 mm Hg. The vapor pressure of ethanol at the new temperature is mm Hg.
Hint: you will need to correct the pressure of air at the new temperature using the Gas Law: P1T1 = P2T2
This question as been asked, and answered, mostly by DrWLS, at least a dozen times in the last week. All of the questions are variations of the same. He has always pointed out that it isn't likely to have a water bath at 300 C although most of the posts have been at 450 C. How do you get water to boil at a temperature higher than 100 C in a water bath?
the question actually asks at 25.7C and 30.0C