Question

why do we get the smell of hot food but not the smell of cold food​

Answer 1

Answer:

When this air reaches our nose, we get the smell of food. ... As the food gets cold, the temperature of the aromatic gases decreases. The kinetic energy of molecules decreases and they do not vibrate as much anymore. Thus, the rate of diffusion decreases and we cannot smell the food from a distance.

Answer 2

Explanation:

Smell is caused by compounds that are easily evaporated. The higher temperature of the hot food makes these compounds evaporate faster. More of the compounds in the air, the more is the smell. Hot food causes the air to rise. The currents set by the hot food helps on spreading the compounds causing smell. In cold food, the evaporation of the compounds are much low and hence the smell also will be low.