5.19 A mixture of dihydrogen and dioxygen at one bar pressure contains 20% by weight of dihydrogen. Calculate the partial pressure of dihydrogen.
A mixture of dihydrogen and dioxygen at one bar pressure contains 20% by weight of dihydrogen.
So, let us assume the weight of dihydrogen in a total mixture weight of be
and dioxygen be
.
Then, the number of moles of will be,
and the number of moles of
,
.
And given that the total pressure of the mixture is .
Then we have a partial pressure of ,
Therefore, the partial pressure of is
.