Refer to the following phase diagram (not to scale!) for oxygen: 49.8 P atm 1.00 0.00150- 54.4 54.8 90.2 154.6 T Kelvin At a pressure of 1 atm, the temperature 54.8 K is called the K The normal boiling point for O2 is at The triple point pressure for O2 is atm of 02. The critical pressure for O2 is 49.8 atm. At temperatures above 154.6 K and pressures above 49.8 atm, O2 is a at 1.50×10-3 atm and 98.4 K. O2 is a O2 is a at 5.42 atm and 46.2 K. 02 is a at 1.00 atm and 66.6 K. Previous Next

Describe the behavior of a liquid and its vapor in a closed vessel as the temperature increases.

The vapor pressure of ethanol, C2H5OH, at 50.0 C is 233 mmHg, and its normal boiling point at 1 atm is 78.3 C. Calculate the vapH of ethanol.

8.87 Use the vapor pressure curves illustrated here to answer the questions that follow. (a) What is the vapor pressure of ethanol (C2H5OH) at 60°C? (b) Considering only carbon disulfide (CS2) and ethanol, which has the stranger intermolecular forces in the liquid state? (c) At what temperature does heptane (C7H16) have a vapor pressure of 500 mm Hg? (d) What are the approximate normal boiling pains of each of the three substances? (e) At a pressure of 400 mm Hg and a temperature of 70°C, is each substance a liquid, a gas, or a mixture of liquid and gas?