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Question

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


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Solution

  • We can smell the hot sizzling food from several meters away because while the food is hot so at a high temperature the molecules diffuse into the air at a faster rate and travel a longer distance.
  • On the other hand when the food is cold vapour diffuses at a slower rate and hence does not travel a longer distance.
  • Therefore, the smell of hot sizzling food reaches you several meters away, but to get the smell of cold food you have to go close.

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