In: Chemistry
Q: A mixture of 0.423 moles of N2 and 5.73 moles of CO2 has a total pressure of 777 torr. What is the partial pressure of N2?
Please give the details of the ploblem, thanks.
Answer –
We are given , moles of N2 = 0.423 mole, moles of
CO2 = 5.73 mol
Total pressure = 777 torr
We know the relationship between total pressure and partial pressure, Dalton’s law
Mole fraction = partial pressure / total pressure
So, first we need to calculate mole fraction of N2
We know,
Mole fraction of N2 = moles of N2 / total moles
Total moles = 0.423 + 5.73
= 6.153 moles
Mole fraction of N2 = 0.423 / 6.153
= 0.0687
So, partial pressure of N2 = mole fraction of N2 * total pressure
= 0.0687 * 777 torr
= 53.4 torr