Question

Give reason for the following observation :
The smell of hot sizzling food reaches us even from a considerable distace but to get the smell from cold food, we have to close to it.

Answer 1

Dear student ,

As we are aware of the fact of kinetic energy , so the kinetic energy of hot sizzling food is much more as compared to cold food . Due to high kinetic energy the smell of hot food can travel easily and diffuse through the air at higher rate and thus can be reached several meters away. On the other hand the kinetic energy of the particle of cold food is much low , hence we need to go close to them to get the smell.

Hot food also increases the temperature of air around it , consequently the latter spreads faster and more as compared to cold air.

Hope you understand