06-03_task (2)

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University of Alabama *

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CALCULUS

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Chemistry

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Jan 9, 2024

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docx

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2

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6.03 Combustion (45 points) Part 1: What is Combustion? Answer the following questions concerning the science of fire. (2 points each) 1. What three components are required for fire to exist? a. heat b. fuel c. oxygen 2. What happens if one of these components is missing? Fire will be extinguished The following equation shows the combustion of ethanol. Refer to the chemical equation to answer the questions that follow. (2 points each) 2C 2 H 6 + 7O 2 4CO 2 + 6H 2 O + heat 3. What are the names of the reactants (not their chemical formulas)? 2C2H6+702 4. What are the names of the products (not their chemical formulas)? 4CO2+6H20+heat Use the chart below to answer the questions that follow. (2 points each) Substance Flash Point ( F) Auto-Ignition Temperature ( F) A 62 685 B –45 536 C 100 410 5. At what temperature will substance C ignite if no spark is provided? 686 6. At what temperature will substance A ignite in the presence of a spark? -44 7. Which of these substances would be considered flammable? b Part 2: Types of Combustion 8. Describe and give examples of the various types of combustion. © ACCESS Virtual Learning 2021
Type of combustion Description (2 points each) Examples (at least 2) (2 points each) Source of information— include title and website address (0.5 point each) Complete All reactions are completely used up when there is enough oxygen The burning of wood during fireworks Toppr;better learning for better results Incomplete Fuel reactions are incomplete if not enough oxygen is available to allow carbon dioxide and water to be released Paper is burned when coal is burned Toppr:better learning for better results Smoldering Bruning of porous fuels at low temperatures and without flame Charcoal embers cigars being burned Home-springer Rapid Heat and light are released when a large amount of energy is released. Wax is burned on a gas stove Online class Note &study Material class notes Spontaneous An event in which fire occurs without an outside heat source Somones garage catches fire from rags hay bales catching fire from a field NPS.gov Homepage(U.S national park service) Explosive Reactions that take place very rapidly Fireworks dynamite Toppr;better learning for better results 9. Which type of combustion reaction do you think is encountered most often by arson investigators (smoldering, rapid, spontaneous, or explosive)? Explain your reasoning in 2-3 complete sentences. (4 points) Write your response below: In most arson cases, the building or house isn’t completely consumed by fire. Typically, a house or building isn’t entirely consumed by fire in an arson attack, Fire often doesn’t completely consume a house or building in arson cases. © ACCESS Virtual Learning 2021
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