IFSTA 7th Edition Chapter 4: Fire Dynamics

IFSTA 7th Edition Chapter 4: Fire Dynamics True or False: Oxidizers affect a fire because they are combustible - ANSWER False. Oxidizers are not combustible but will support or enhance combustion Physical science is the study of what two things? - ANSWER Matter and energy Oxidation - ANSWER A chemical reaction involving the combination of an oxidizer, such as oxygen in the air, with other materials. Energy - ANSWER The capacity to perform work Work - ANSWER This occurs when a force is applied to an object over a distance or when a substance undergoes a chemical, biological, or physical change. In the case of heat, work means increasing a substance's temperature Potential Energy - ANSWER The amount of energy that an object can release at some point in the future. Stored energy Heat of Combustion - ANSWER The potential energy available for release in the combustion process Kinetic Energy - ANSWER The energy that a moving object possesses What are the 7 types of energy? - ANSWER Chemical Thermal Mechanical Electrical Light Nuclear Sound How is energy measured in the International System of Units (SI)? - ANSWER With joules How many joules is required to change the temperature of 1 gram of water by 1 degree Celsius? - ANSWER 4.2J In the customary system, the unit of measurement for heat is what? - ANSWER The British Thermal Unit (Btu) What is the British thermal unit? - ANSWER The amount of heat required to raise the temperature of 1 pound of water by 1 degree Fahrenheit 1 Btu equals how many joules? - ANSWER 1055 J