Chemical Reactions and Energy Changes Quiz
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Questions and Answers

What type of chemical reaction releases thermal energy to the surroundings?

  • Exothermic reaction (correct)
  • Endothermic reaction
  • Reaction where thermal energy is neither released nor absorbed
  • Reaction that absorbs thermal energy

    • In an endothermic reaction, the flow of thermal energy is from the $$ to the $$.

  • Products, reactants
  • Reactants, products
  • Surroundings, reaction system (correct)
  • Reaction system, surroundings

    • Which of the following statements about the energy changes in a chemical reaction is correct?

  • The energy changes in a chemical reaction are independent of whether the reaction is exothermic or endothermic.
  • The direction of energy flow in a chemical reaction depends on whether the reaction is exothermic or endothermic. (correct)
  • Endothermic reactions always release thermal energy, while exothermic reactions always absorb thermal energy.
  • Exothermic reactions always release thermal energy, while endothermic reactions always absorb thermal energy.

    • In an exothermic reaction, the $$ of the reaction system $$ as thermal energy is released to the surroundings.

    <p>Temperature, increases</p> Signup and view all the answers

    Which of the following is an example of an exothermic reaction?

    <p>Burning of a candle</p> Signup and view all the answers

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