Hydrogen diffused through a porous plug
-
A.
thrice as fast as oxygen -
B.
at the same speed as oxygen -
C.
four times as fast as oxygen -
D.
twice as fast as oxygen
Correct Answer: Option C
Explanation
Using Graham’s Law of Diffusion,
(frac{R_1}{R_2} = sqrt{frac{m_2}{m_1}})
(frac{R_H}{R_O} = sqrt{frac{m_O}{m_H}})
(frac{R_H}{R_O} = sqrt{frac{32}{2}})
(frac{R_H}{R_O} = sqrt{16} = 4)
(therefore R_H = 4 times R_O)
Therefore, hydrogen diffuses 4 times faster than oxygen.
There is an explanation video available below.