The oxygen gas emitted from an aquatic plant during photosynthesis is collected over water at a temperature of 25 degrees Celcius and a total pressure of 752 torr. What is the partial pressure of the oxygen gas?
you need to find the pressure for water vapor for certain temperatures. this is given in a table and have been calculated for you.
use the dalton's law of Partial pressure. i.e. the Pressure for the dry gas equals the Total pressure of the system - the pressure of water vapor for that temperature.
hope that helps.
To find the partial pressure of the oxygen gas emitted from the aquatic plant, we need to know the partial pressure of water vapor in the collected gas.
To determine the partial pressure of water vapor at a given temperature, you can use a reference table or use the formula:
Pwater vapor = Psaturation (water vapor) x relative humidity
However, the question does not provide information about the relative humidity. So for simplicity, we can assume that the relative humidity is 100%, meaning the air is saturated with water vapor.
At 25 degrees Celsius, the saturation vapor pressure of water vapor is 23.8 torr.
Therefore, the partial pressure of the water vapor in the collected gas is 23.8 torr.
To find the partial pressure of the oxygen gas, we subtract the partial pressure of the water vapor from the total pressure:
Partial pressure of oxygen = Total pressure - Partial pressure of water vapor
Partial pressure of oxygen = 752 torr - 23.8 torr = 728.2 torr.
So, the partial pressure of the oxygen gas emitted from the aquatic plant is 728.2 torr.