Dalton's law of partial pressures. The total is the sum of each.
ptotal = pH2 + pAr + pHe
A closed container with a mixture of hydrogen, helium, and argon has a total pressure of 2.55 atm. The partial pressure of hydrogen is 0.700 atm and the partial pressure of argon is 705 mm Hg. What is the partial pressure of helium?
2 answers
Total pressure=partial pressure of mixture
Total pressure=partial pressure of Hydrogen +PHe+Pa
Partial pressure of Hydrogen= 0.700 atm
Total pressure=2.55
Partial pressure of AR= 705 mm, lets convert that to atm. 1 atm=760 mm Hg
705/760mm of Hg
705/760=partial pressure of AR= 0.92763158=0.92
2.55=0.700 atm +Partial Pressure of He +0.92
0.7+0.928=1.628
2.55= 1.628 + partial Pressure of He
subtract 1.628 from 2.55, 2.55-1.628=0.930
So the answer would be partial pressure of helium is 0.930 atm.
Total pressure=partial pressure of Hydrogen +PHe+Pa
Partial pressure of Hydrogen= 0.700 atm
Total pressure=2.55
Partial pressure of AR= 705 mm, lets convert that to atm. 1 atm=760 mm Hg
705/760mm of Hg
705/760=partial pressure of AR= 0.92763158=0.92
2.55=0.700 atm +Partial Pressure of He +0.92
0.7+0.928=1.628
2.55= 1.628 + partial Pressure of He
subtract 1.628 from 2.55, 2.55-1.628=0.930
So the answer would be partial pressure of helium is 0.930 atm.
1 answer