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Give reasons for the following observati...

Give reasons for the following observation: The smell of hot sizzling food reaches you several metres away. But to get the smell from cold food you have to go close.

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### Step-by-Step Solution: 1. **Understanding Diffusion**: Diffusion is the process by which particles spread from an area of higher concentration to an area of lower concentration. This process occurs in gases, liquids, and solids, but it is most noticeable in gases. 2. **Temperature and Molecular Movement**: The temperature of a substance affects the energy of its molecules. When food is hot, its molecules have higher kinetic energy, which means they move more rapidly. This increased movement allows the scent particles to diffuse more quickly and spread out over a larger area. 3. **Smell of Hot Food**: When hot food is sizzling, the molecules are vibrating and moving rapidly. This rapid movement allows the scent molecules to escape into the air quickly, enabling the smell to reach you from several meters away. The higher energy of the molecules facilitates faster diffusion. ...
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