In an experiment, a sample of 6.35 L of nitrogen at 25.0°C and 768 mmHg is bubbled through liquid acetone, C3H6O. The gas plus vapor at its equilibrium partial pressure leaves the liquid at the same temperature and pressure. If 6.550 g of acetone has evaporated, what is the vapor pressure of acetone at 25.0°C? See Problem 11.143.
Problem 11.143
The vapor pressure of a volatile liquid can be determined by slowly bubbling a known volume of gas through the liquid at a given temperature and pressure. In an experiment, a 5.40-L sample of nitrogen gas, N2, at 20.0°C and 745 mmHg is bubbled through liquid isopropyl alcohol, C3H8O, at 20.0°C. Nitrogen containing the vapor of C3H8O at its vapor pressure leaves the vessel at 20.0°C and 745 mmHg. It is found that 0.6149 g C3H8O has evaporated. How many moles of N2 are in the gas leaving the liquid? How many moles of alcohol are in this gaseous mixture? What is the mole fraction of alcohol vapor in the gaseous mixture? What is the partial pressure of the alcohol in the gaseous mixture? What is the vapor pressure of C3H8O at 20.0°C?