Question

The vapor pressure of benzene (C₆H₆) is 73.0 mm Hg at 25 °C. What is the vapor pressure of a solution consisting of 188 g of benzene and 0.110 mol of a nonvolatile nonelectrolyte?

Answer 1

To find the vapor pressure of the solution, calculate the mole fraction of benzene and use Raoult's law to calculate the total vapor pressure.

Step-by-step explanation:

To find the vapor pressure of the solution, we need to calculate the mole fraction of benzene in the solution, then use it to calculate the total vapor pressure above the solution at 50°C. Here are the steps:

1. Calculate the mole fraction of benzene: mole fraction of benzene = moles of benzene / total moles of solution
2. Calculate the mole fraction of isobutene in the vapor phase: mole fraction of isobutene = 1 - mole fraction of benzene
3. Use Raoult's law to find the vapor pressure: total vapor pressure = mole fraction of benzene * vapor pressure of benzene + mole fraction of isobutene * vapor pressure of isobutene