The pressure of a 1:4 mixture of dihydrogen and dioxygen enclosed in a vessel is one atmosphere. What would be the partial pressure of dioxygen?

MOLE FRACTION=

Let the moles of dihydrogen=1 and dioxygen=4


Mole fraction of O2=


=


Partial pressure= mole fraction Х Total pressure


= ×1


= 0.8atm


= 0.8×105Nm-2


= 8×104Nm-2

1