Thermodynamics Section 2 Quiz

10 Questions | Total Attempts: 494

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Thermodynamics Quizzes & Trivia

Quiz


Questions and Answers
  • 1. 
    Thermodynamic reactions play important roles in all of the following except...
    • A. 

      Car engines

    • B. 

      Refrigerators

    • C. 

      Hitting baseballs

    • D. 

      Cooking food

  • 2. 
    What is a calorimeter?
    • A. 

      A unit of calories per meter.

    • B. 

      An insulated device used to measure the amount of heat absorbed or released during a chemical or physical process.

    • C. 

      The amount of heat required to raise the temperature of one gram of pure water by one degree Celsius.

    • D. 

      All of the above.

  • 3. 
    What is the formula for measuring quantity of heat?
    • A. 

      Q = c × m × ∆T

    • B. 

      ∆H rxn = H final - H initial

    • C. 

      PV = nRT

    • D. 

      F = ma

  • 4. 
    Chemical reactions and physical changes that absorb energy from their surroundings are __________.
    • A. 

      Isothermic

    • B. 

      Exothermic

    • C. 

      Endothermic

    • D. 

      Mesothermic

  • 5. 
    The universe is defined as the system plus the surroundings. universe = system + surroundings
    • A. 

      True

    • B. 

      False

  • 6. 
    The heat content of a system at constant pressure is defined as the ___________.
    • A. 

      Entropy

    • B. 

      Heat

    • C. 

      Work

    • D. 

      Enthalpy

  • 7. 
    What kind of energy transfers occurs during the heat-pack reaction?
    • A. 

      Heat from the reaction flows from the heat pack (system) to the cold hands (surroundings)

    • B. 

      Heat from the reaction flows from the heat pack (surroundings) to the cold hands (system)

    • C. 

      Heat from the reaction flows from the cold hands (surroundings) into the heat pack (system)

    • D. 

      None of the above

  • 8. 
    For the reaction below, the enthalpy change is +624.7 kJ. How would you classify this reaction? SiO2(g) + 3C(s) → SiC(s) + 2CO(g)
    • A. 

      Endothermic reaction, heat is gained by the system

    • B. 

      Exothermic reaction, heat is lost from the system

    • C. 

      Endothermic reaction, heat is lost from the system

    • D. 

      Exothermic reaction, heat is gained by the system

  • 9. 
    Enthalpy changes for exothermic reactions are always positive.
    • A. 

      True

    • B. 

      False

  • 10. 
    A 75.0-g sample of a metal is place in boiling water until its temperature is 100.0°C. A calorimeter contains 100.00 g of water at a temperature of 24.4°C. The metal sample is removed from the boiling water and immediately placed in water in the calorimeter. The final temperature of the metal and water in the calorimeter is 34.9°C. Assuming that the calorimeter provides perfect insulation, what is the specific heat of the metal?
    • A. 

      0.900 J/(g •°C)

    • B. 

      0.900 J

    • C. 

      1.11 J/(g •°C)

    • D. 

      1.68 J

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