Question

which event is most likely occurring?
o diffusion because particles move from regions of high concentration to regions of low concentration
o diffusion because particles move from regions of low concentration to regions of high concentration
o effusion because there is a movement of a gas through a small opening into a larger volume
o effusion because there is a movement of a gas through a large opening into a smaller volume

Explanation:

Diffusion is the movement of particles from an area of high - concentration to an area of low - concentration. Effusion is the movement of a gas through a small opening into a larger volume. In the given image, particles are spreading out from a region of higher concentration to a lower one, which is the characteristic of diffusion.

Answer:

diffusion because particles move from regions of high concentration to regions of low concentration