Question

Equal masses of hydrogen gas and oxygen gas are placed in a closed container at a pressure of 3.4 atm. the contribution of hydrogen gas to the total pressure is.

Answer 1

Let mass of hydrogen and oxygen be 100g

Let n1 be no.of moles of hydrogen
n2 be no. of moles of oxygen

n1 =100/2 = 50
n2 =100/32 = 3.125

Contribution of hydrogen to the total pressure means, mole fraction of hydrgen present in the mixture, which is also the partial pressure of H2

x1 is the mole fraction of hydrogen,
x1 = 50/(50+3.125)
= 0.94

If P is the total pressure, then contribution of H2 is 0.94P