When temperature increases, the random movement of molecules increases which subsequently increases diffusion rate. If you have the same concentration of each of the following substances and they all have the same molecular weight, predict which substance will have the greatest diffusion rate? a. substance #3 in aliquid at 64' F
b. substance 14 in a gas at 32 F
c. substance #2 in aliquid at a 32°F
d. substance #5 in a gas at 78' F
e. substance in a semisolid at 78' F

d. substance #5 in a gas at 78' F

Explanation:

Diffusion in substances simply has to do with the movement of the particles of a substance from one point to another.

The rate of diffusion varies in gases, liquids and solids. Gas molecules are usually more energetic than molecules of solids and liquids. Gases and are also in constant random motion at high velocities.

Therefore, substance #5 in a gas at 78' F will have the greatest diffusion rate.

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