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It is difficult to burn a heap of green leaves but dry leaves catch fire easily. Explain.?
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Most Upvoted Answer
It is difficult to burn a heap of green leaves but dry leaves catch fi...
Why green leaves are difficult to burn?



  • Green leaves contain a high percentage of water which prevents them from catching fire easily. The water content in green leaves ranges from 50 to 75 percent.

  • Water has a high heat capacity and requires a large amount of energy to be evaporated. This means that when green leaves are exposed to heat, the water in them absorbs most of the heat and prevents the leaves from reaching their ignition temperature.

  • In addition, the moisture in green leaves also dilutes the flammable gases that are produced during combustion, making it difficult for the leaves to catch fire.



Why dry leaves catch fire easily?



  • Dry leaves have a low moisture content, typically between 5 to 10 percent, which makes them more flammable than green leaves.

  • When exposed to heat, the dry leaves quickly reach their ignition temperature and start to burn.

  • The low moisture content in dry leaves also means that there is less water to absorb the heat, allowing the leaves to heat up more quickly and reach their ignition temperature faster.

  • In addition, the flammable gases produced during combustion are not diluted by moisture, which makes the combustion process more efficient and increases the intensity of the fire.



Conclusion


In conclusion, the high moisture content in green leaves makes them difficult to burn, while the low moisture content in dry leaves makes them more flammable and easier to ignite. It is important to properly dispose of dry leaves and other flammable materials to prevent accidental fires.
Community Answer
It is difficult to burn a heap of green leaves but dry leaves catch fi...
Because green leaves doesn't achieved it's ignition temperature whereas dry leaves achieved it's ignition t and don't catch fire easily
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A soy to play with:Take an empty match bos. Take out its tray. Cut a used. refill of a ball pen of the same width as the tray as shown in the figure below. Fix the refill with two pins on the top of the tray as shown in Fig. 12.18. Make two holes on the opposite sides of the tray. Make sure that the holes are large enough to allow a thread to pass through them easily. Take a thread about a metre long and pass it through the holes as shown. Fix beads at the two ends of the thread so that it does not come out. Insert the tray in the outer cover of the matchbox.Suspend the match box by the thread. Leave the thread loose. The match box will start falling down due to gravity. Tighten the thread now and observe what happens.Explain your observation. Can you relate it to friction explain the observations for thisfriction?

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It is difficult to burn a heap of green leaves but dry leaves catch fire easily. Explain.?
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