Chemistry Chapter on Chemical Reactions
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Questions and Answers

What is the characteristic of an exothermic reaction?

  • It requires a catalyst.
  • It changes the chemical state of substances.
  • It absorbs heat.
  • It releases heat. (correct)

    • What does activation energy (Ea) represent in a chemical reaction?

  • The total energy of products.
  • The minimum energy needed to initiate a reaction. (correct)
  • The energy lost as heat.
  • The maximum energy of reactants.

    • Which term describes the unstable state during a chemical reaction?

  • Equilibrium
  • Transition State (correct)
  • Final State
  • Reactant State

    • What does an energy profile graph illustrate?

    <p>The activation energy and energy changes during a reaction.</p> Signup and view all the answers

    What does equilibrium refer to in the context of chemical reactions?

    <p>The condition where the rate of the forward and reverse reactions are equal.</p> Signup and view all the answers

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