Question

equal weight of ethane and hydrogen are mixed in empty container at 25 degree Celsius, the fraction of the total pressure exerted by hydrogen

Answer 1

Let x g each of hydrogen and ethane are mixed.

The moles of hydrogen and methane are

x\2

and

x\30

respectively.

The mole fraction of hydrogen is

=x2\x\2+x\30=15\16

.

The partial pressure of hydrogen is the product of its mole fraction and total pressure.

Thus

Partial pressure of H2 Total pressure=mole fraction of hydrogen=15\16

Answer 2

Thanks for your question !

We suppose x per gram to hydrogen and ethane is given.

Let the mole of H2 = x/2 and that of methane is x/30.

The equation will form - x2 \ x \ 2 + x \ 30
= 15 \ 16.
Hence, the total pressure will be 15\16.