Preview - Energy In Chemical Reactions

Modeling the Trials

Consider the following as you model the interaction occurring in trials 1 and 3 below:

  • The drawing space is meant to represent a zoom-in of the test tube, so there is no need to illustrate the test tube itself in your model. Only illustrate the contents inside the test tube.
  • Temperature that was measured was of the surroundings, not of the system itself.
  • Temperature correlates directly with kinetic energy. If temperature increases, kinetic energy should also increase.
  • Follow the law of conservation of energy: the total number of energy boxes (potential energy + kinetic energy) filled in the before portion of your model must match the total number of energy boxes filled in the after portion.

Questions

Please answer the questions below.

Model the interaction occurring in trial 1 with a minimum of two zinc particles and two iodine molecules below. In order to complete the model below, consider zinc and iodine to be the system and the test tube and surrounding air to be the surroundings.

Note: Draw your sketch in the sketchpad below

Now model the interaction occurring in trial 3. Remember trial 3 is exactly double the quantities in trial 1. Again, consider zinc and iodine to be the system and the test tube and surrounding air to be the surroundings.

Note: Draw your sketch in the sketchpad below

Trial 3 is double the quantity of reactants that were used in trial 1. List every difference in your models that expresses this quantity difference.

Notes

These notes will appear on every page in this lesson so feel free to put anything here you'd like to keep track of.