Interpretation: Need to give a reason for the explosive rapidity of the needles on a dried-out fir tree.
Concept introduction: The reaction that occurs without any external force is known as a spontaneous reaction.
Answer to Problem 121A
The availability of oxygen on the surface of dried-out fir tree and their porous characteristics makes them easy to catch fire and ignite spontaneously.
Explanation of Solution
Dried-out fir trees are combustible substances, that can easily catch fires. The needles on these trees can burn easily in flash causing a fierce fire. It can produce sparks that can easily fly into rooms, furniture, and décor or may enter the kitchen if placed in a room. Thus, it is advisable to keep these trees out of the rooms.
Precautions to be taken with fir trees are as follows:
- The stand of the tree must be filled with fresh water every day.
- Drying of natural trees can occur easily but this can be slowed down if watering is done on the daily basis.
- The burning rate of dry trees is much more than a well-hydrated tree as they require a longer time to ignite while dry trees can catch fire easily from even a single spark.
The availability of oxygen on the surface of dried-out fir tree and their porous characteristics makes them easy to catch fire and ignite spontaneously.
Chapter 24 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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