Thermodynamics: Energy Changes
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Questions and Answers

What type of reaction involves the release of energy?

  • Thermochemical
  • Exothermic (correct)
  • Thermodynamic
  • Endothermic

    • What is the term for the flow of energy from a higher temperature to a lower temperature?

  • Thermal equilibrium
  • Heat
  • Internal energy
  • Heat transfer (correct)

    • Which of the following is an example of an endothermic reaction?

  • Rusting of iron
  • Burning logs
  • Melting ice (correct)
  • Combustion process

    • What is the study of heat and temperature and their relation to other forms of energy called?

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

    What is the opposite of thermal equilibrium?

    <p>None of the above</p> Signup and view all the answers

    What is the change in enthalpy represented by?

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

    What is the result of heat transfer in a system when it reaches thermal equilibrium?

    <p>Heat stops flowing and temperatures balance out</p> Signup and view all the answers

    What is the relation between heat and work in thermodynamics?

    <p>Work can be used to create heat, and heat can be used to create work</p> Signup and view all the answers

    What type of reaction is represented by the process of freezing water into ice?

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

    What is the application of exothermic and endothermic reactions in instant cold and hot packs?

    <p>To treat sports injuries</p> Signup and view all the answers

    What is the direction of heat transfer?

    <p>From higher to lower temperature</p> Signup and view all the answers

    What is the significance of ΔH in a reaction?

    <p>It represents the change in enthalpy of the reaction</p> Signup and view all the answers

    What type of reaction is represented by the process of photosynthesis?

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

    What is the term for the internal energy of a system?

    <p>Internal energy (U)</p> Signup and view all the answers

    What happens to the energy during an exothermic reaction?

    <p>Energy is released from the reactants</p> Signup and view all the answers

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