Fire Extinguisher:Classes:A) Standard combustibles such as wood, clothing, paper, upholstery, plastics, trashB) Combustible liquids such as gasoline , oil and petroleum, as well as paint. May also include combustible gases like butane and propane. Does not include fires containing cooking oils and grease. C) Electric lights/electrical equipment such as motors, transformers and household appliances. If the power or electricity is cut, a Class C fire becomes a fire of one of the other classes. D) Combustible metals such as alkali metals, alkaline earth metals, semiconductors. For example potassium, magnesium, aluminumK) Cooking oils and fats such as animal fats and vegetable fatsWhy each is so specific:Water and foam: extinguishes fire by removing the fire element from the fire triangle. The foam separates the oxygen element from fire and other elements. Water extinguishers are only used for Class A fires of wood, paper, upholstered furniture, textiles and clothing. It should not be used on class B as this will spread the liquid and on class C as it could create a shock. Carbon Dioxide: Extinguishes fires by drawing the oxygen element away from the fire triangle and also eliminates heat with a release of cold. Can be used on classes B and C without fear of creating a shock or spreading a flammable liquid. Does not work for Class A fires because most are incomplete combustion reactions, which would add more oxygen and carbon, making the fire larger and spread. Dry Chemical: Extinguish the fire by interfering with the chemical reaction of the fire triangle. Multipurpose structures most used on classes A, B; C. also works by making a barricade between the oxygen element and the combustible element of Class A fires. Mo...... middle of paper ...... extinguish. Gas Laws: Avogadro's Law: Equivalent volumes of gas under the same temperature and pressure conditions will have an equivalent number of atoms (particles, molecules, ions, electrons). , etc.). Charles' Law: As the temperature increases, the volume of the gas also increases (directly proportional) provided the pressure and quantity of gas are constant. Boyle's Law: As the pressure of the gas increases, the volume decreases. As the volume increases, the gas pressure decreases. The temperature is constant.Guy-Lussac's Law: As the temperature of the gas increases, the pressure of the gas also increases provided that the volume and quantity 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 quantity of gas remains constant.