Question
In: Chemistry
A mixture of carbon dioxide and nitrogen gases, in a 7.69 L flask at 36 °C,...
A mixture of carbon dioxide and nitrogen gases, in a 7.69 L flask at 36 °C, contains 10.4 grams of carbon dioxide and 7.77 grams of nitrogen. The partial pressure ofnitrogen in the flask is (?) atm and the total pressure in the flask is (?) atm
thanks in advance
Solutions
Expert Solution
CO2 moles = 10.4 / 44 = 0.2364
N2 moles = 7.77 / 28 = 0.2775
total moles = 0.5139
mole fraction of N2 = moles of N2 / total moles
= 0.2775 / 0.5139
= 0.540
V = 7.69 L
T = 36 + 273 = 309 K
P V = n R T
P x 7.69 = 0.5139 x 0.0821 x 309
P = 1.695 atm
total pressure = 1.695 atm
partial pressure of N2 = mole fraction of N2 x total pressure
= 0.540 x 1.695
= 0.916 atm
partial pressure of N2 = 0.916 atm
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