Although wood has a very high calorific value, we still discourage
its use as a fuel. Explain.
NCERT Class VIII
Science - Exemplar Problems
Chapter 6. Combustion and Flame
Answers
Answered by
219
CALORIFIC VALUE :
The amount of heat energy liberated when 1 kilogram of a fuel is burned, is called its calorific value or heat value. This liberated heat energy is measured in kiloJoule (kJ). The higher the calorific value of a fuel the better fuel it is.
Although wood has a very high calorific value, we still discourage its use as a fuel because :
1.Wood release unburnt carbon particles. These fine particles are dangerous pollutants causing respiratory diseases such as asthma.
2. Incomplete combustion of wood give carbon monoxide gas which is a very poisonous gas and pollute the air.
3. Combustion of fuels like wood releases carbon dioxide in the environment causes global warming (rise in the temperature of the atmosphere).
4. To use wood as a fuel leads to deforestation.
5. Trees give us many useful substances. If we use wood as a fuel we cut down trees and then we can't get useful substances from trees.
HOPE THIS WILL HELP YOU….
The amount of heat energy liberated when 1 kilogram of a fuel is burned, is called its calorific value or heat value. This liberated heat energy is measured in kiloJoule (kJ). The higher the calorific value of a fuel the better fuel it is.
Although wood has a very high calorific value, we still discourage its use as a fuel because :
1.Wood release unburnt carbon particles. These fine particles are dangerous pollutants causing respiratory diseases such as asthma.
2. Incomplete combustion of wood give carbon monoxide gas which is a very poisonous gas and pollute the air.
3. Combustion of fuels like wood releases carbon dioxide in the environment causes global warming (rise in the temperature of the atmosphere).
4. To use wood as a fuel leads to deforestation.
5. Trees give us many useful substances. If we use wood as a fuel we cut down trees and then we can't get useful substances from trees.
HOPE THIS WILL HELP YOU….
Answered by
106
We get wood from trees and it. takes many years for a seed to become a tree.If we would encourage use of wood as a fuel then very soon the whole earth would turn intii a desert
because cutting trees leads to deforestation and that would disturb the whole ecological balance.This reason is one of the biggest reasons
that inspire us not to use wood as a fuel.
Second main reason would be the availability of other sources of fuel.
Third main reason is that. burning of wood releases many dangerous gases that are bad for atmosphere
because cutting trees leads to deforestation and that would disturb the whole ecological balance.This reason is one of the biggest reasons
that inspire us not to use wood as a fuel.
Second main reason would be the availability of other sources of fuel.
Third main reason is that. burning of wood releases many dangerous gases that are bad for atmosphere
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