Question

give reason for the following observation the smell of hot sizzling food reaches us even from a considerable distance but to get the smell from cold the smell the food we have to go close to it

Answer 1

When in air heat increases the kinetic energy also increases ,therefore the air around hot sizzling food gets the kinetic energy ,hence the aroma reaches us from a distance .

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.