Exothermic and Endothermic Reactions
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Questions and Answers

What is a characteristic of an exothermic reaction?

  • It requires an external energy source
  • It always occurs spontaneously
  • It absorbs energy from the surroundings
  • It releases energy in the form of heat (correct)

    • Which type of reaction is an example of forming a chemical bond?

  • Endergonic reaction
  • Exothermic reaction (correct)
  • Spontaneous reaction
  • Endothermic reaction

    • What is the difference between an endergonic reaction and an endothermic reaction?

  • Endergonic reactions release energy, while endothermic reactions absorb energy
  • Endergonic reactions occur spontaneously, while endothermic reactions do not
  • Endergonic reactions require energy, while endothermic reactions requires energy in the form of heat (correct)
  • Endergonic reactions absorb energy, while endothermic reactions release energy

    • Why do exothermic reactions usually feel hot?

    <p>They give off heat to the surroundings</p> Signup and view all the answers

    What is an example of an endergonic reaction?

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

    What happens when the breaking breaking a chemical bond?

    <p>Energy is absorbed</p> Signup and view all the answers

    Which of the following chemical reactions is an example of a combustion reaction?

    <p>Hexanol and oxygen</p> Signup and view all the answers

    What type of reaction occurs when hydrogen bromide reacts with iron metal?

    <p>Redox reaction</p> Signup and view all the answers

    What is the primary type of energy possessed by an object due to its motion or movement?

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

    What happens to the thermal energy of a cup of hot tea when milk is added?

    <p>It decreases</p> Signup and view all the answers

    What is the term for the energy that arises from the temperature of matter?

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

    What is the term for the energy of motion possessed by an object due to its velocity?

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

    What is the primary indication that a chemical reaction has occurred?

    <p>The production of new substances with different physical and chemical properties</p> Signup and view all the answers

    What type of reaction is characterized by the breaking and forming of chemical bonds?

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

    What is the result of the rusting of a steel garbage can?

    <p>The formation of iron oxide (Fe2O3)</p> Signup and view all the answers

    What is the difference between a chemical change and a physical change?

    <p>A physical change involves a change in appearance, while a chemical change involves the breaking of chemical bonds</p> Signup and view all the answers

    What is an example of a chemical change?

    <p>The rusting of a steel garbage can</p> Signup and view all the answers

    What is a characteristic of a chemical reaction?

    <p>A change in the composition of molecules</p> Signup and view all the answers

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