Why smells of good food diffuse from a bag to your nose?

Smells of good food diffuse from a bag to your nose due to a process called diffusion. Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration. In the case of food smells, the molecules of the food's aroma are released into the air from the bag. These molecules then spread out and travel to your nose, where they are detected by your olfactory receptors.

The rate of diffusion depends on several factors, including the temperature, the size of the molecules, and the concentration of the molecules. In general, diffusion occurs more quickly at higher temperatures, with smaller molecules, and with higher concentrations of molecules.

In the case of food smells, the high temperature of the food helps to speed up the diffusion of the aroma molecules. The small size of the aroma molecules also allows them to diffuse quickly through the air. And the high concentration of aroma molecules in the bag ensures that there are plenty of molecules to travel to your nose.

As a result of these factors, the smells of good food can quickly and easily diffuse from a bag to your nose, making your mouth water and your stomach rumble!