Question

The total pressure of a mixture of H2, He, and Ar is 99.3 kPa. The partial pressure of the He is 42.7 kPa, and the partial pressure of Ar is 54.7 kPa. What is the partial pressure of hydrogen

Answer 1

`P_(H_2)=1.9kPa`

Step-by-step explanation:

Hello,

Here, by using the Dalton's law, we can quantify the total pressure of a gaseous mixture by knowing the partial pressure of each gas, in case, hydrogen, helium and argon:

`P_T=P_(H_2)+P_(He)+P_(Ar)`

In such a way, since we actually know the partial pressure of helium and argon, and the total pressure, we can compute the partial pressure of hydrogen as shown below:

`P_(H_2)=P_T-P_(He)+P_(Ar)=99.3kPa-42.7kPa-54.7kPa\\\\P_(H_2)=1.9kPa`

Best regards.