Height is obtained from different sources both natural and artificial.
✓ The sun is natural source of Heat
✓Artificial source of heat are those that are human made
HEAT SOURCES IN THE LABORATORY
There are different source of it that can be used in chemistry laboratory such as
- Spirit lamp
- Bunsen burner
- Kerosene stove
- Gas stove
FLAMES
Flame is a zone of burning gases that produces heat and light
✓it is the visible glowing part of a fir
TYPES OF FLAME
1. Luminous flame
2. Non-luminous flame
Luminous flame is a yellow frame that is caused by insufficient oxygen in the ozone of burning gas.
✓due to insufficient supply of oxygen in the burning zone of gas there is a black substance that is formed which is known as soot
Characteristics of luminous flame
- Yellow in colour
- Produce soot
- Produces less heat
- Has a wave flame
Non luminous flame
Non luminous flame is blue flame due to adequate supply of oxygen and so the fuel barns efficiently. Non-luminous flame does not produce any sort.
Characteristics of non-luminous flame
THE BUNSEN BURNER
Bunsen burner is a laboratory heat source consisting of vertical metal tube connected to a gas source.
Bunsen burner is able to produce a very hot flame from a mixture of gas and air.
HOW BUNSEN BURNER WORKS
√Gas enter the burner through a tube connected to a jet inside the base.
√enter the burner through the air holes at the base.
✓amount of air coming into can be varied by turning the collar.
√mixture of gas and air are burns at the barrel.
The type of flame obtain depend on how much oxygen is available for burning
1.when air holes are closed there is less oxygen and flame produced is luminous flay.
2. when is the air holes are full open there is enough oxygen and flame is non-luminous flame.
Characteristics of non-luminous flame
- It is blue in colour
- It does not produce the soot
- Produces more heat
- Has a triangular frame
- Bands with a roaring noise
THE BUNSEN BURNER
Bunsen burner is a laboratory heat source consisting of vertical metal tube connected to a gas source.
Bunsen burner is able to produce a very hot flame from a mixture of gas and air.
HOW BUNSEN BURNER WORKS
√Gas enter the burner through a tube connected to a jet inside the base.
√enter the burner through the air holes at the base.
✓amount of air coming into can be varied by turning the collar.
√mixture of gas and air are burns at the barrel.
The type of flame obtain depend on how much oxygen is available for burning
1.when air holes are closed there is less oxygen and flame produced is luminous flay.
2. when is the air holes are full open there is enough oxygen and flame is non-luminous flame.
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