What do all fire involve?
A heat-producing chemical reaction between some type of FUEL and an OXIDIZER, most commonly oxygen in the air. Oxidizers are not combustible on their own, but will support or enhance combustion.
Describe Fire Dynamics
The meeting point between fire science, material science, fluid dynamics of gases, and heat transfer.
What is the study of matter, energy, and includes chemistry and physics.
Physical science
What is a physical change ?
A physical change occurs when a substance remains chemically the same but changes in size, shape, or appearance.
What is a Chemical reaction.
A chemical reaction occurs when a substance changes into another substance, such as two or more substances combining to form compounds.
What is oxidation.
Oxidation is a chemical reaction combining an oxidizer, such as oxygen in the air with other materials.
What is energy?
Energy is the capacity to perform work.
What are forms of energy?
Forms of energy are classified as potential or kinetic.
What is Potential energy?
Potential energy represents the amount of energy an object can release.
What is heat of combustion?
Heat of combustion is the potential energy available for release in the combustion process.
The rate at which a fuel releases energy over a period of time depends on what variables.
Chemical composition
Arrangement
Fuel Density
Availability of oxygen for combustion.
What is Kinetic energy?
Kinetic Energy is the energy a moving object possesses.
Name the types of energy.
Chemical
Thermal
Mechanical
Electrical
light
Nuclear
Sound
What is Joules?
Joules is the measurement of energy in the International System Of Units(SI).
How much heat is required to change the temperature of 1 gram of water?
The quantity of heat required to change the temperature of 1 gram of water by 1 degree Celsius is 4.2 joules.
What is the customary unit of measurement for heat?
The unit of measurement for heat is the British thermal unit BTU.
What is a BTU?
A BTU is the heat required to raise the temperature of 1 pound of water by 1 degree Fahrenheit.
Compare Joules and BTU
1,055 J = 1BTU
What does potential energy convert to during combustion?
Kinetic energy
A reaction that emits energy as it occurs is?
Exotermic Reaction
What is fire?
Fire is an exothermic chemical reaction that releases energy in the form of heat and sometimes light.
What are reactions that absorb energy?
Endothermic reaction.
What is the difference in the fire triangle and the Tetrahedron?
They both include Heat, Oxygen, and fuel. While the tetrahedron also includes a chemical reaction.
What is a chemical change in solids off gassing called ?
Pyrolysis
