Combustion Flashcards
Water extinguisher
Use; Wood, paper and textiles.
Don’t use; Flammable liquids. Live electrical equipment.
Test for Oxygen
Light a splint, but only begin the test when it is glowing. When Oxygen is present the splint fire will relight.
What is the fire triangle - what is the main purpose of this scientific model?
The fire triangle is a scientific model used to describe the three components of combustion - fuel, heat and oxygen.
Its main purpose is to represent that the removal or lack of any of these components results in no combustion or incomplete combustion.
Exothermic definition
A chemical reaction that occurs, which means the reaction transferee energy to its surroundings. This causes the surrounding area and the reaction to feel hot.
Law of conservation of mass
The law of conservation of mass refers to the law that during a chemical reaction no mass can be lost or gained. The particles of the reactants rearrange.
Chemical reaction for a Metal Oxide
Metal + Oxygen —> Metal Oxide
Hydrocarbon definition
A chemical compound which contains only hydrogen and carbon atoms.
Carbon Dioxide Extinguisher
Use; Flammable liquids. Live electrical equipment.
Don’t use; In confined spaces.
Is Combustion Endothermic or Exothermic?
Combustion is an Exothermic reaction, meaning it transfers energy into the surrounding area.
Wet Chemical Extinguisher
Use; Wood, paper and textiles. Cooking oil fires.
Coal oxidation
Coal + Oxygen —> Carbon dioxide
Combustion equation (when hydrocarbon)
Hydrocarbon + Oxygen —> Carbon dioxide + Water
Fuel definition
A chemical substance from which stored energy can be transferred usefully to make things happen.
Endothermic definition
A chemical reaction that occurs, which means the reaction takes energy from its surroundings. This causes the surrounding area and the reaction to feel cold.
Test for Water
Method 1; Using Cobalt paper, when water is present the paper turn from white to pink.
Method 2; Using Cobalt Chloride crystals, when water is present the crystals turn from blue to pink.
Combustion definition
Another name for burning. This is when a fuel reacts with oxygen to release energy - in the forms of heat light or sound.
Test for Hydrogen
A lit splint should create a squeaky pop in an environment with high levels of hydrogen.
What is the chemical symbol for hydrocarbons?
CH4
Metal Oxide definition
A metal oxide is created when a metal chemically combines with oxygen.
Forest fire definition
An uncontrolled fire that burns in the wild land vegetation, often in rural areas.
Test for Carbon dioxide
Clear lime-water solution at the start. When Carbon dioxide is present the solution will turn cloudy.
Incomplete combustion definition
When fuel combusts with little or lack of oxygen.
Hydrogen oxidation
Hydrogen + Oxygen —> Water
Dry Powder Extinguisher
Use; Wood, paper and textiles. Flammable liquids. Gaseous fires. Live electrical fires.
