Question

Four gases were combined in a gas cylinder with these partial pressures: 3.5 atm n2, 2.8 atm o2, 0.25 atm ar, and 0.15 atm he. what is the total pressure inside the cylinder? atm 2 equations: first, p subscript t equals p subscript 1 plus p subscript 2 plus p subscript 3 plus ellipses plus p subscript n. second: startfraction p subscript a over p subscript t endfraction equals startfraction n subscript a over n subscript t endfraction.

Answer 1

The Total Pressure inside the cylinder is 6.7

What is Total Pressure?

The sum of all pressures in a reference system is the total pressure, or ptot.

The partial pressures of the individual gases make up the total pressure of the gas combination. The total number of moles in the gas mixture, or ntot, is equal to the sum of all ni. Ptot = Pi = P1 + P2 + P3...

P $o^{2}$ = $\frac{n o^{2} }{nT}$ .P T

= X$o^{2}$ . P T

Hence, mole fraction of o₂ : o₂

= Po₂/PT

= 2.8/6.7

Xo₂ = 0.42

Mole fraction of Air = 0.25/6.7

= 0.04

The cylinder's internal pressure is 6.7.

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