Question

give reasons for the following observation:
the smell of hot sizzling food reaches you several meters away but to get the smell from cold food you have to go close.

P.S. don't copy or write the answer from the net. i have already seen it.

Answer 1

the smell of hot sizzling food reaches us by the process of diffusion of gases into the air. the rate of diffusion of hot gases is faster than cold gases. so the smell of food reaches us even we are several meters away because the rate of diffusion of hot gases is much faster than than the cold gases released by cold 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.