Question

The diffusion coefficient of an ideal gas is proportional to its mean free path and mean speed. The absolute temperature of an ideal gas is increased 4 times and its pressure is increased 2 times. As a result, the diffusion coefficient of this gas increases $x$ times. The value of $x$ is:___

Answer 1

Diffusion constant $\propto \frac{3/2}{P}$
$\frac{(4T{)}^{3/2}}{2P}=4\frac{T^{3/2}}{P}$