chemistry

posted by .

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 400C, the total pressure is 980 mm Hg. The vapor pressure of ethanol at the new temperature is ? mm Hg.

  • chemistry -

    At 257 C (which is 530 K), 878-762 or 116 mm Hg is the partial pressure of ethanol, and 762 mm Hg is the partial pressure of air.

    At 400 C (673 K), the air's partial pressure increases to (673/530)*762 = 967.6 mm Hg. That would leave only 12.4 mm Hg for the partial pressure of ethanol if the total pressure is 980 mm Hg.

    These numbers don't make sense. The partial pressure of ethanol should go up, not down, with temperature and I don't see how one could have a water bath at 400 C. Are sure you copied the numbers correctly?

  • chemistry -

    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 400C, 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

  • chemistry -

    he meant 25.70 and 40.00 degrees celsius

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chem

    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 400C, the total pressure is 980 mm Hg. The vapor …
  2. chemistry

    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 450C, the total pressure is 980 mm Hg. The vapor …
  3. Chemistry

    I saw that this was posted earlier but i can't find the previous one with the answer. Please Help. I don't understand how to make this equation work The total pressure in a flask containing air and ethanol at 257C is 878 mm Hg. The …
  4. chemistry

    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 400C , the total pressure is 980 mm Hg. The vapor …
  5. chemistry

    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 …
  6. Chem

    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 450C, the total pressure is 980 mm Hg. The vapor …
  7. chem

    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 …
  8. Chemistry

    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 425C, the total pressure is 980 mm Hg. The vapor …
  9. Chemistry

    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 450C, the total pressure is 980 mm Hg. The vapor …
  10. Chemistry

    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 450C, the total pressure is 980 mm Hg. The vapor …

More Similar Questions