Question

why can we smell hot food from a distance?

Answer 1

Because on increasing the temperature, the kinetic energy f the particles also increases....

That is why hot food has fast moving particles that easily scatter in the air rather than that of the cold food...........

Answer 2

The kinetic energy of particle is more in hot food so their diffusion rate is also high that's why the smell of hot food reaches us several metres away.... Usually,when the food is cooked at that time evaporation is occur and food smell is also comes out through evaporation.