Question

A mixture of helium, argon, and xenon gases are present in a container. What is the partial pressure of helium if the total pressure is 49.2 kPa and the partial pressure of Ar is 15.6 kPa and 21,4 kPa for Xe?

Answer 1

Answer:

$P_{He} = 12.2\,kPa$

Explanation:

Let assume that each gas behaves ideally, the total pressure is the sum of the pressures of each gas. Therefore:

$P_{total} = P_{He} + P_{Ar} + P_{Xe}$

$P_{He} = P_{total} - P_{Ar} - P_{Xe}$

$P_{He} = 49.2\,kPa - 15.6\,kPa - 21.4\,kPa$

$P_{He} = 12.2\,kPa$

Answer 2

Answer:

Partial pressure of He is 12.2 KPa

Explanation:

According to Dalton law of partial pressure, the net pressure of a gaseous mixture is always equal to the sum of the partial pressures of individual gases.

Now we are given that total pressure is 49.2 KPa

Partial pressure of Ar is 15.6

Partial pressue of Xe is 21.4

Partial Pressure of He?

Using dalton's law;

49.2 = 15.6 + 21.4 + Pp of He

Partial pressure of He is 12.2 KPa