Heat of Combustion and Fire Chain Reaction
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Questions and Answers

What is the term used to describe the heat and light released when a substance burns?

  • Heat of Fusion
  • Heat of Reaction
  • Heat of Combustion (correct)
  • Heat of Evaporation
  • To sustain a fire, which of the following is NOT required?

  • Fuel
  • Oxygen
  • Light (correct)
  • Heat
  • What is the main factor that influences the rate of a chemical reaction like oxidation?

  • Color of the Substance
  • Texture of the Substance
  • Temperature (correct)
  • Size of the Container
  • Which reaction does NOT necessarily produce a visible flame?

    <p>Oxidation of Iron to Rust</p> Signup and view all the answers

    In the combustion process, what role does oxygen play?

    <p>Sustains the Fire</p> Signup and view all the answers

    What does the speed of molecules have to do with the rate of a chemical reaction?

    <p>Faster molecules increase the number of collisions, speeding up the reaction</p> Signup and view all the answers

    What term describes the minimum temperature needed to spontaneously ignite fuel?

    <p>Ignition point</p> Signup and view all the answers

    In the context of oxidation reactions, which term describes reactions where more energy is liberated than what is required to initiate the reaction?

    <p>Exothermic reactions</p> Signup and view all the answers

    Which of the following forms of energy is mentioned in the text as associated with oxidation reactions?

    <p>Chemical energy</p> Signup and view all the answers

    What is the primary function of a criminalist in an arson investigation based on the text?

    <p>Detecting and identifying chemical materials at the scene</p> Signup and view all the answers

    Which concept is NOT associated with an oxidation reaction, according to the text?

    <p>Rusting</p> Signup and view all the answers

    What feature characterizes the perpetrator's behavior in arson investigations, based on the information provided?

    <p>Thorough planning</p> Signup and view all the answers

    What physical state must a fuel be in to achieve a reaction rate with oxygen sufficient to produce a flame?

    <p>Gaseous</p> Signup and view all the answers

    Why does the conversion of iron to rust proceed slowly?

    <p>Iron cannot achieve a gaseous state</p> Signup and view all the answers

    Which fuel type requires its temperature to be high enough for vaporization before burning?

    <p>Gasoline</p> Signup and view all the answers

    What does the production of noticeable quantities of heat and light indicate during a reaction?

    <p>Speed of the reaction</p> Signup and view all the answers

    What is the significance of the flash point in starting a fire?

    <p>It refers to the temperature at which a fuel vaporizes and can ignite</p> Signup and view all the answers

    Why is the ignition temperature of a fuel higher than the flash point?

    <p>To require external heat sources for ignition</p> Signup and view all the answers

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