Question

A mixture of dihydrogen at one bar pressure contains 20% by weight of dihydrogen

Answer 1

Answer:

Pressure of the gas mixture = 1 bar

Let us consider 100g of the mixture

So ,mass of hydrogen in the mixture = 20 g

& mass of oxygen in the mixture = 80 g

Using the respective molar masses, we get

nH = 20/ 2 = 10 mol

. nO = 80 / 32 = 2.5 mol

Then, pH = XH x Ptotal

= (nH / nH + nO) x P total

= (10 / 10 + 2.5 ) x 1

= 0.8 bar

Hence, the partial pressure of dihydrogen is 0.8 bar.