Combustion and Flame
Presentation
•
Chemistry
•
8th Grade
•
Medium
Abhi Prithi
Used 9+ times
FREE Resource
5 Slides • 4 Questions
1
combustion
The burning of any sustance in the presence of oxygen is known as combustion. combustion is mostly of 2 types the 3rd type is known as explosion. there are many useful reasons to apply combustion in our daily life, but there are some of the disadvantages too.
2
Due to chemical, biological, or physical processes, combustible materials self-heat to a temperature high enough for ignition to occur.
Spontaneos combustion
Rapid combustion is a process in which large amount of heat and light are released in a very short span of time.
Rapid combustion
3
uses of combustion
Some text here about the topic of discussion
#Coal
#Petrol
#Wood
#Charcoal
#Kerosene
Burning of fuels
*The substance that undergoes combustion is said to be combustible, it is condidered as a fuel.
4
Cow dung cake- 6000-8000
Wood-17000-22000
Coal-25000-33000
Kerosene- 45000
Petrol-45000
Diesel-45000
Methane-50000
CNG-50000
Biogas-35000-40000
Hydrgen-150000
fuel- Calorific value. kJ/kg
5
6
Multiple Choice
The hottest zone of a candle flame is
Non-luminous zone
Luminous zone
dark zone
blue zone at the base of the wick.
7
Multiple Choice
Which poisonous gas is formed as a result of incomplete combustion?
Coal gas
carbon monoxide
carbon dioxide
nitrogen oxide
8
Multiple Choice
Good fuels have
low ignition temperature and high calorific value
high ignition temperature and high calorific value
low ignition temperature and low calorific value
high ignition temperature and low calorific value
9
Open Ended
How does Carbon dioxide extinguish fire?
combustion
The burning of any sustance in the presence of oxygen is known as combustion. combustion is mostly of 2 types the 3rd type is known as explosion. there are many useful reasons to apply combustion in our daily life, but there are some of the disadvantages too.
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