If the concentration of pure o-xylene in hair above a pool of pure o-xylene is 200 g/m3 at 25 C which direction can o-xylene move vapor pressure of pure o-xylene is 0.00871 atm
To determine the direction in which o-xylene can move, we need to compare the concentration of o-xylene in the hair to its vapor pressure. The movement of o-xylene depends on whether the concentration is higher or lower than its vapor pressure.
In this case, we're given that the concentration of pure o-xylene in the hair above the pool is 200 g/m3 at 25°C. However, we also need to know the vapor pressure of the o-xylene to make a comparison.
The vapor pressure of pure o-xylene is given as 0.00871 atm. To determine the direction of movement, we can compare the concentration with the vapor pressure using the following steps:
1. Convert the concentration of o-xylene from grams per cubic meter (g/m3) to moles per liter (mol/L) using its molar mass.
- The molar mass of o-xylene is 106.17 g/mol.
- Convert 200 g/m3 to moles per liter by dividing by the molar mass and multiplying by 1000 (to convert cubic meter to liters).
2. Now we have the concentration of o-xylene in moles per liter. Let's compare it with the vapor pressure.
- If the concentration is higher than the vapor pressure, o-xylene will tend to move from the hair into the air (evaporation).
- If the concentration is lower than the vapor pressure, o-xylene will tend to condense from the air onto the hair (condensation).
By comparing the concentration and vapor pressure, you can determine the direction in which o-xylene is likely to move.