The document discusses different types of combustion such as rapid combustion and spontaneous combustion. It defines combustion as a chemical reaction between a substance and oxygen that releases heat. A flame is described as the visible gaseous part of a fire caused by a highly exothermic reaction taking place in a thin zone. Explosions are reactions where a large amount of gas is liberated suddenly. It notes the disadvantages of burning fuels can include releasing carbon particles and gases like carbon monoxide, carbon dioxide, sulfur dioxide and nitrogen oxides which are dangerous or contribute to issues like global warming and acid rain.

1. Flame
&
combustion
A PPT BY AJIT

2. WHAT IS COMBUSTION ?
•COMBUSTION: A CHEMICAL PROCESS IN WHICH A
SUBSTANCE REACTS WITH OXYGEN TO GIVE OFF HEAT
IS CALLED COMBUSTION

3. DIFFERENT TYPES OF COMBUSTIONS
•RAPID COMBUSTION : WE FIND THAT THE GAS BURNS RAPIDLY
AND PRODUCES HEAT AND LIGHT. SUCH COMBUSTION IS CALLED
RAPID COMBUSTION
•SPONTANEOUS COMBUSTION: A TYPE OF COMBUSTION IN WHICH
A MATERIAL SUDDENLY BURSTS INTO FLAME IS CALLED
SPONTANEOUS COMBUSTION

4. WHAT IS FLAME ?
FLAME: A FLAME IS A VISIBLE ,GASEOUS
PART OF A FIRE IT IS CAUSED BY A
HIGHLY EXOTHERMIC REACTION TAKING
PLACE IN A THIN SOME

5. WHAT IS EXPLOSIN ?
EXPLOSION: A LARGE AMOUNT OF GAS FORMED IN THE
REACTION IS LIBERATED .SUCH A REACTION IS CALLED
EXPLOSION.

6. IGNITION TEMPERATURE, INFLAMMABLE
SUBSTANCE…..
•IGNITION TEMPERATURE: THE LOWEST TEMPERATURE AT WHICH A
SUBSTANCE CATCHES FIRE IS CALLED ITS IGNITION TEMPERATURE .
•INFLAMMABLE SUBSTANCE: THE SUBSTANCES WHICH HAVE A VERY
LOW IGNITION TEMPERATURE AND CAN CATCH FIRE EASILY IS A CALLED
INFLAMMABLE TEMPERATURE

7. DISADVANTAGES OF BURNING FUELS
•1:CARBON FUELS LIKE WOOD ,COAL ,PETROLEUM RELEASE
UNBURNT CARBON PARTICLES. THIS PARTICLES ARE
DANGEROUS FOR RESPIRATION AND CAN CAUSE DISEASE LIKE
ASTHMA.

8. •INCOMPLETE COMBUSTION OF THESE FUELS GIVES CARBON
MONOXIDE GAS IT IS DANGEROUS TO BURN COAL IN A CLOSED ROOM
.THIS CAN EVEN KILL THE PERSON SLEEPING IN THAT ROOM
•COMBUSTION OF MOST FUELS RELEASES CARBON DIOXIDE IN THE
ENVIRONMENT ,INCREASE OF CARBON DIOXIDE IN THE AIR CAUSE
GLOBAL .

9. •BURNING OF COAL AND DIESEL RELEASES SULPHUR DIOXIDE GAS
.IT IS AN EXTREMELY SUFFOCATION AND CORROSIVE GAS. PETROL
ENGINES GIVES OFF GASEOUS OXIDES OF NITROGEN .OXIDE OF
SULPHUR AND NITROGEN DISSOLVES IN RAIN WATER AND FROM
ACIDS SUCH RAIN IS CALLED ACID RAIN.IT IS VERY HARMFULL
FOR PLANTS.

10. • THANK YOU
•
• A PPT BY AJIT