Total Pressure in a vessel containing Oxygen collected over water at 25 *C was 723 torr. The Vapor Pressure of water at that Temperature is 23.8 torr. What was the pressure of gas?
Ptotal = Pgas + pH2O
Pgas = ?
To determine the pressure of the gas in the vessel, called the partial pressure of the gas, subtract the vapor pressure of water from the total pressure.
The equation to calculate the partial pressure of the gas is:
Partial pressure of gas = Total pressure - Vapor pressure of water
In this case, the total pressure is given as 723 torr and the vapor pressure of water at 25 *C is given as 23.8 torr.
Substituting the values into the equation:
Partial pressure of gas = 723 torr - 23.8 torr
Calculating the partial pressure of the gas:
Partial pressure of gas = 699.2 torr
Therefore, the pressure of the gas in the vessel is 699.2 torr.