Question

Give reason for the smell of hot sizzling food reaches you several metres away, but to get the smell from cold food you have to go close. ​

Answer 1

When food is hot, diffusion is more. But in cold food diffusion is slow. Hence to get the smell from cold food we have to go close.

Answer 2

Particles in the air, if fueled with higher temperatures, acquire high kinetic energy which aids them to move fast over a stretch. Hence the smell of hot sizzling food reaches a person even at a distance of several meters.