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Endothermic and Exothermic Reactions

Endothermic and Exothermic Reactions. Fizzing. Materials 250 ml beaker Vinegar Baking soda Computer Temperature probe. Directions. Follow the teacher’s directions for connecting the temperature probe to the computer and starting Logger Pro

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Endothermic and Exothermic Reactions

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  1. Endothermic and Exothermic Reactions

  2. Fizzing • Materials • 250 ml beaker • Vinegar • Baking soda • Computer • Temperature probe

  3. Directions • Follow the teacher’s directions for connecting the temperature probe to the computer and starting Logger Pro • Go to my website and click on Matter  Activities • Under Chemical Reaction Lab click on Temperature #1 and save the file to the desktop • Open the Temperature #1 file in Logger Pro

  4. Directions • Put 25 ml of vinegar in the beaker • Put the temperature probe in the vinegar so it doesn’t move • Start the graph, wait 20 seconds, and then put in ½ spoon of baking soda • Stop the graph after 1 minute

  5. Questions • Sketch the graph from the computer and label the x and y axis. • Initial temperature: • Final temperature: • Change in temperature: • Did the mixture get colder, hotter, or stay the same? • Is this an endothermic or exothermic reaction?

  6. Clean Up • Pour out the vinegar and baking soda mixture in the sink and rinse it down with water. • Rinse the beaker out with water. • Return the baking soda and vinegar.

  7. Fantastic Foamy Fountain • Materials • 250 ml beaker • 100 ml beaker • Hydrogen peroxide • Container • Dry yeast • Dish washing soap • Food coloring

  8. Directions • Click on Data  Clear All Data • Put the 250 ml beaker in the container

  9. Directions (continued) • Add 25 ml of hydrogen peroxide to the 250 ml beaker. • Add 3drops of food coloring. • Add one squirt of dishwashing liquid to the hydrogen peroxide and swirl gently for a few seconds. • Put the temperature probe in this mixture.

  10. Directions (continued) • Add 50 ml of water to the 100 ml beaker. • Add ½ spoon of dry yeast. • Swirl the yeast and water for 30 seconds • Start the graph and at 20 seconds pour the yeast and water mixture into the hydrogen peroxide mixture. • Let the graph run for 1 minute.

  11. Questions • Sketch the graph from the computer and label the x and y axis. • Initial temperature: • Final temperature: • Change in temperature: • Did the mixture get colder, hotter, or stay the same? • Is this an endothermic or exothermic reaction?

  12. Clean Up • Rinse out the yeast and water beaker. • Pour the contents of the 200 ml beaker into the sink and rinse it down with water. • Clean the 200 ml beaker with a brush and the cleaning powder. • Return both beakers, dishwashing liquid, hydrogen peroxide, and food coloring the front table.

  13. Clean Up (continued) • Rinse off the temperature probe. • Disconnect all of the parts of the temperature probe and bring it all to the front table. • Returned the computer to the back. • Wipe your area well. • Return your goggles to the back counter.

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