Chemistry 121 Chapter 5 Part 1

16 Questions | Total Attempts: 118

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Questions and Answers
  • 1. 
    The study of the heat associated with chemical reactions and physical processes 
    • A. 

      State Function

    • B. 

      Thermochemistry

    • C. 

      Chemical Energy

  • 2. 
    One that can exchange energy to the surroundings freely
    • A. 

      Open Systems

    • B. 

      Closed System

    • C. 

      Isolated

  • 3. 
    Allows energy to escape but not the mass
    • A. 

      Open Systems

    • B. 

      Isolated

    • C. 

      Closed System

  • 4. 
    Allows nothing to transfer between the system and the surroundings
    • A. 

      Open Systems

    • B. 

      Isolated

    • C. 

      Closed System

  • 5. 
    The ability to do work
    • A. 

      Joules

    • B. 

      State Function

    • C. 

      Energy

  • 6. 
    The energy that is stored in the structural units of the chemical substances
    • A. 

      Calorimetry

    • B. 

      Chemical Energy

    • C. 

      Enthalpy (H)

  • 7. 
    Gives out heat and transfers heat energy to the surroundings.  Theses heat values are always negative 
    • A. 

      Endothermic

    • B. 

      Bond Energy

    • C. 

      Exothermic

  • 8. 
    Chemical reaction that takes in heat from the surroundings.  These heat values are always positive 
    • A. 

      Endothermic

    • B. 

      Exothermic

    • C. 

      Chemical Energy

  • 9. 
    The unit of measure used for measuring energy changes
    • A. 

      Joules

    • B. 

      Enthalpy Change

    • C. 

      Thermochemistry

  • 10. 
    Properties that are determined by the state of the system, regardless of how that condition was achieved 
    • A. 

      Hess’s Law

    • B. 

      Closed System

    • C. 

      State Function

  • 11. 
    Used to quantify the heat flow into or out of a system in a process that occurs at constant P, V. 
    • A. 

      Enthalpy Change

    • B. 

      Enthalpy (H)

    • C. 

      Endothermic

  • 12. 
    The measurement of heat changes.
    • A. 

      Calorimetry

    • B. 

      Joules

    • C. 

      State Function

  • 13. 
    The value of energy needed to break a bond
    • A. 

      Enthalpy Change

    • B. 

      Energy

    • C. 

      Bond Energy

  • 14. 
    The difference in energy between product and reactant
    • A. 

      Thermochemistry

    • B. 

      Enthalpy Change

    • C. 

      State Function

  • 15. 
    It takes energy to break bonds, and energy is given back when bonds are made
    • A. 

      Energy, taken

    • B. 

      Energy, given back

    • C. 

      Calorimetry, given back

  • 16. 
    When reactants are converted to products, the enthalpy of the reaction is the same, no matter if it occurs in one step or a series of steps 
    • A. 

      Hess’s Law

    • B. 

      Calorimetry

    • C. 

      Enthalpy (H)

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