In: Chemistry
A mixture of carbon dioxide and nitrogen gases, at a total pressure of 889 mm Hg, contains 7.17 grams of carbon dioxide and 5.38 grams of nitrogen. What is the partial pressure of each gas in the mixture?
PCO2 =___(?)___ mm Hg
PN2 = __(?)__ mmHg
CO2 moles = 5.38 / 44 = 0.122
N2 moles = 7.17 / 28 = 0.256
total moles = 0.378
mole fraction of N2 = moles of N2 / total moles
= 0.256 / 0.378
= 0.677
mole fraction of Co2 = 0.323
total pressure = 889 mmHg
partial pressure of N2 = mole fraction of N2 x total pressure
= 0.677 x 889
= 593 mmHg
partial pressure of N2 = 593 mmHg
partial pressure of CO2 = 296 mmHg