Question

the smell of hot sizzling food reaches you several metres away but to get the smell from cold food you have to go close why give reason?

Answer 1

this is due to the diffusion of food particle and gaseous particles and this diffusion rate is directly proportional to the temperature .or it increases with increase in temp and decrease with decrease in temp.

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.