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Equal weights of methane, and hydrogen are mixed in an empty container at 25^{\circ} \mathrm{C} . The fraction of the total pressure exerted by Hydrogen is -

Option: 1

1 / 2


Option: 2

8 / 9


Option: 3

1 / 9


Option: 4

16 / 17


Answers (1)

let x grams of each hydrogen and methane are mixed,
         moles of  \mathrm{\mathrm{H}_2=\frac{x}{2}}
         moles of  \mathrm{\mathrm{CH}_4=\frac{x}{16}}
\mathrm{\therefore ~Mole ~fraction ~of \mathrm{~H}_2=\frac{x / 2}{x / 2+x / 16}=\frac{8}{9} }

\mathrm{\Rightarrow \frac{\text { Partial pressure of } \mathrm{H}_2}{\text { total pressure }}=\text { mole fraction of } \mathrm{H}_2=\frac{8}{9} }

Posted by

Ramraj Saini

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