Essay On Fire Extinguisher

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Fire extinguisher:
Classes:
A) Standard combustibles such as wood, clothing, paper, soft furnishing, plastics, trash
B) Combustible liquids such as gasoline, oil and petroleum, and paint. Could also include combustible gases like butane and propane. Does not include fires that contain cooking oils and grease
C) Electrical fires/ electrical equipment such as motors, transformers, and appliances. If power or electricity is removed then a class C fire becomes a fire of one of the other classes
D) Combustible metals such as alkali metals, alkaline earth metals, semi conductors. For example potassium, magnesium, aluminum
K) Cooking oils and greases such as animal fats and vegetable fats
Why each so specific:
Water and foam: extinguishes fire by taking away the element of fire from the fire triangle. The foam separates the element of oxygen away from the fire and the other elements. Water fire extinguishers are only used for class A fires for wood, paper, soft furniture, textiles, and clothing. It should not be used on class B for it would spread the liquid and class C because it could create a shock
Carbon dioxide: extinguish fires by taking away the element of oxygen away from the fire triangle and as well removes the heat with a cold release. Could be used on class B and C for no fear of creating a shock or spreading flammable liquid. Does not work for class A fires as most are incomplete combustion reactions therefore would add more oxygen and carbon making the fire bigger and would spread
Dry chemical: extinguish the fire by interfering with the chemical reaction of the fire triangle. Most used multipurpose works on class A, B; C. also works by making a barricade between the element of oxygen and fuel element of class A fires. Mo...

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...e fire out.

Gas Laws:
Avogadro’s Law: equivalent volumes of gases under same temperatures and pressured conditions will have equivalent number of atoms (particles, molecules, ions, electrons, etc).
Charles’ Law: as temperature increases the volume of the gas increases too (directly proportional) providing that the pressure and the amount of gas is constant
Boyle’s Law: as pressure of the gas increases the volume decreases. As volume increases, the pressure of the gas decreases. Temperature is constant.
Guy-Lussac’s Law: as temperature of the gas increases the pressure of the gas increases as well provided that the volume and the amount of gas are constant. Temperature and pressure are directly proportional.
Combined gas law: the product of pressure and volume divided by the absolute temperature of the gas is constant as long as the amount of gas is kept constant

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