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

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

Grade:12th pass

1 Answers

Pawan Prajapati
askIITians Faculty 9723 Points
14 days ago
The smell of hot sizzling food reaches you several meters away, but to get the small from cold food, we have to go close because the kinetic energy of particles of matter increases with the increases in temperature. Complete answer: > Diffusion is the net movement of particles (for example, atom, ions, molecules) from a region of higher concentration to a region of lower concentration. Diffusion is driven by a gradient in concentration. > As per the collision theory, faster diffusion will take place if the surroundings are warmer. The speed of a molecule is proportional to the square root of the absolute temperature and temperature is the measure of the average kinetic energy of molecules in an object, therefore when the temperature increases the molecules will have more kinetic energy, so they move faster. When this happens the rate of diffusion also increases, the opposite will happen if the temperature decreases. The Brownian motion of the molecules increases with temperature, and therefore the diffusion. > Particles of hot sizzling food possess large kinetic energy and diffuse in air rapidly and reach several meters away. Particles of cold food possess less kinetic energy and are not able to reach several meters away. Particles of matter possess kinetic energy and keep moving constantly. > At lower temperatures, particles in cold food have low kinetic energy. At higher temperatures, particles have high kinetic energy and move faster hence, due to this smell of hot sizzling food reaches you several meters away, but to get the smell from cold food you have to go close. Note: Particles of matters are continuously moving. They possess kinetic energy. As the temperature rises, particles move faster. Thus particles that carry small hot sizzling food move faster than the particles carry the cold food.

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