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Heat of reaction

  1. Nov 30, 2008 #1
    PART A: Heat of Solution of Solid NaOH
    1. Measure 100mL of distilled water into a graduated cylinder. Pour the water into a clean, dry beaker and allow it to stand until it
    reaches the room temperature.
    2. Using a spatula weigh exactly 2.00 g of sodium hydroxide.
    3. Measure the temperature of the water in the beaker. Record this as Ti in Part A of the data table.
    4. Add the solid NaOH to the water in the beaker. Use the thermometer to stir the mixture until all the NaOH has dissolved
    temperature stops rising. Record the highest temperature as Tf in Part A of the data table.
    5. Discard the solution. Rinse off the thermometer and dry the beaker.
    PART B: Heat of Neutralization of HCl and NaOH Solutions
    6. Measure 50.0mL of 1M HCl and pour it into the beaker. Allow the acid to stand until it reaches the room temperature. Record
    this temperature as Ti in Part B of the data table.
    7. Add exactly 50.0mL of 1M NaOH solution to HCl solution. Stir with the thermometer and record the highest temperature as Tf in
    Part B of the data table.
    8. Discard the solution. Rinse off the thermometer and dry the beaker.
    PART C: Heat of solution of solid NaOH
    9. Measure 100mL of 0.5M HCl and pour it into the beaker. Handle this acid carefully. Allow it to stand until it reaches the room
    temperature.
    10. Using a spatula weigh exactly 2.00 g of sodium hydroxide.
    11. Measure the temperature of the acid in the beaker. Record this as Ti in Part C of the data table.
    12. Add the solid NaOH to the acid and stir the mixture with the thermometer. Record the highest temperature as Tf in Part C of the
    data table








    what are some possible errors in a heat of reaction experiment?
     
    Last edited: Nov 30, 2008
  2. jcsd
  3. Nov 30, 2008 #2

    Borek

    User Avatar

    Staff: Mentor

    You just don't ask. You try, you tell us what you did, we push you in the right direction.
     
  4. Nov 30, 2008 #3
    I did everything that is said above.
     
  5. Nov 30, 2008 #4

    Borek

    User Avatar

    Staff: Mentor

    But you have not listed a single source of error. You must have some ideas.
     
  6. Dec 1, 2008 #5
    oh
    the thermometer reading may have being read incorrectly.
    some heat was lost to the enviroment because the beaker does not contain the heat and
    heat was lost during stirring of solution with the thermometer.
     
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