Question

In a mixture of 2 ideal gases, A and B, PA = 0.2PB, what is the mole fraction of A?

Answer 1

0.1667

Step-by-step explanation:

Hello,

Dalton's law defines:

`y_i=(P_i)/(P_T)`

A total pressure is:

`P_T=P_A+P_B`

So, for A (solving for
`P_A` in the previous equation, we get:

`y_A=(P_A)/(P_A+P_B)`

Since
`P_A=0.2P_B`, we obtain:

`y_A=(P_A)/(P_A+P_A/0.2)\\y_A=(1)/(6)\\y_A=0.1667`}

Best regards.