A mixture of gases at a total pressure of 95 kPa contains N2, CO2, and O2. The partial pressure of the CO2 is 24 kPa and the partial pressure of the N2 is 48 kPa. What is the partial pressure of the O2?
The sum of the partial pressures is equal to total pressure.
To find the partial pressure of O2, we need to subtract the partial pressures of CO2 and N2 from the total pressure.
Given:
Total pressure = 95 kPa
Partial pressure of CO2 = 24 kPa
Partial pressure of N2 = 48 kPa
To find the partial pressure of O2:
Partial pressure of O2 = Total pressure - (Partial pressure of CO2 + Partial pressure of N2)
Substituting the given values:
Partial pressure of O2 = 95 kPa - (24 kPa + 48 kPa)
Calculating:
Partial pressure of O2 = 95 kPa - 72 kPa
Partial pressure of O2 = 23 kPa
Therefore, the partial pressure of O2 is 23 kPa.
To find the partial pressure of O2, we need to know the total pressure and the partial pressures of the other gases (CO2 and N2) in the mixture.
Given:
Total pressure of the mixture (Ptotal) = 95 kPa
Partial pressure of CO2 (PCO2) = 24 kPa
Partial pressure of N2 (PN2) = 48 kPa
To find the partial pressure of O2 (PO2), we can use the equation:
Ptotal = PCO2 + PN2 + PO2
Rearranging the equation, we can solve for PO2:
PO2 = Ptotal - PCO2 - PN2
Substituting the given values:
PO2 = 95 kPa - 24 kPa - 48 kPa
Calculating:
PO2 = 95 kPa - 72 kPa
PO2 = 23 kPa
Therefore, the partial pressure of O2 in the mixture is 23 kPa.