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.​

Answer 1

The smell of hot sizzling food reaches you several meters away, but to get the smell from cold food you have to go close.

Following are the reasons that explain the above statement.

1. Food when hot, has higher kinetic energy, with higher kinetic energy the particles in food travel at a faster rate and too long distances.
2. Whereas, the smell of cold food does not travel far due to low kinetic energy.
3. In the case of hot sizzling food, the air above food expands due to heating and thus travel carrying the essence of food.
4. For this reason, we can smell hot food from a distance.
5. Whereas, for cold food due to low kinetic energy air does not expand and does not travel far and we have to go close to smell the food.