Question

Why is it that the smell of hot food reaches you at a distance but not cold food?

Answer 1

becoz hot food have high kinetic energy and larger intermolecular space and reaches at a distance but cold food have less kinetic energy then hot food

Answer 2

When molecules of some volatile substances from hot sizzling food diffuse into air and reach the odur sensitive part of our nose we have the perception of smell.

At higher temperature of molecules diffuse into air at a faster rate and therefore travel long distances.

Hence the smell of hot sizzling food reaches as quickly even when we are several metres away.

While on the contrary , when the food is called the vapour diffuse is at a slower rate and therefore does not travel longer distances.

So, one has to come closer to have the perception of smell.