Question

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

Answer 1

The particles of hot sizzling food have more kinetic energy and thus , diffuse rapidly in the air as compared to cold food which posses less kinetic energy.

Answer 2

The smell of the hot food reaches the person several meters away, but to get the smell of cold food the person has to go close because:

• The difference between hot and cold food is the temperature. So, the reason is the difference in temperatures.
• At high temperatures, the diffusion rate is maximum.
• This means the gas molecules will spread very fast.
• As the temperature drops, the diffusion rate will also decrease.
• At extremely low temperatures, the diffusion rate is minimum and hence the gas molecules spread very slowly.
• This is the reason why the smell of hot food can travel more distance than the smell of cold food.