UTF-8Template for Final ExamTemplate for Chem 352 Final Exam
Save this final as "Last_Name_Final_Exam." Save the simulation in the ORIGINAL state, with instructions on how to run it (what variables to change)
and a description of the observed results, how you interpret them, and the conclusions you draw from the results to answer the original question.
The first part of the assignment is to choose a question to investigate that meets two criteria:
1. It is interesting and addresses an issue you want to learn more about by conducting a computer experiment.
2. It is specific enough to be doable -- to be able to construct a set of simple simulations in which you can investigate
the effects of specific variables one at a time (for example, mass, intermolecular forces, size of particles, temperature etc.).
Your Name:{________Carl Breidebach_________}
1. State the Question you are investigating:
{My investigation will cover conductivity and more importantly the role that distance between and size of molecules plays in the trasmission of electons along a conducting surface.
}
2. Explain why this quesion is interesting:
{I think the results of this experiment will give viewers of it a better understanding of conductors and what we can do to make better conducting surfaces.
}
3. Explain why this quesion is specific enough to be testable with simulation so as to give a definite answer.
{The perameters are easily input into the Molecular Workbench application, as the peramters being tested are simple distance and size changes (to be done in two seperate simulations) and it is a simple matter of counting the electrons deposited onto the far plate.
}
4. Describe your reasoning in building the simulation the way you did, the testing you did, and changes you
had to make to make it work.
{The simulation uses a line of positively charged particles to simulate a conducting surface and a mass of smaller negatively charged particles to simulate electrons. At the end of the line is a barrier that disallows the particles to hit it to bounce back, allowing an easier counter of particles moved.
}
5. What variables will stay fixed for the experiment and how did you choose the values for those variables?
{Charge between simulation, size of 'electrons' will remain the same. The distance the "electron" must travel will also remain the same.
In the simulation the distance between the positively charged particles will remain the same but the volume of the positive particle will differ.
Also, the temperature between both will be kept constant.
}
6. What variable will you change to answer the question? Over what range of values will you test the effect of the variable?
{The variable changed in the simulation will be the size of the particles.
}
7. What variables will you monitor or measure? How will you output or measure them? Examples of variables we
have output include the volume, the temperature (or average KE), the total energy, the potential energy, the arrangements of
particles, etc.
{The variable that will be measure will be the amount of negatively charged "electrons" deposited on the wall will be counted after a certain time period. The difference between total deposition should indicate which of the simulations is best for conducting electrons.
}
8. Usually you need to equilibrate your simulation before running to measure results. Will you equilibrate your simulation with the heat bath on (Isothermally) or without the heat bath -- i.e. Adiabatically? Explain.
{
The simulation will come to equilibrium through being run, no pre-equilibration will be necessary.
}
9. When you actually run the simulation -- will you do it with the heat bath on or off? Explain.
{
The heat bath will be on, due to the need to keep the temperature constant.
}
10. Provide directions for someone else to run your simulations to reproduce the experiments you got, and describe the results you obtained:
{
Press "Run this Model" and after 70000 fs stop and count the number of "electons" deposited on the collection barrier. After this time the elctron supply on the far end runs out and the electrons do not flow anymore.
}
11. State the answer to your question and intepret the results in terms of relevant fundamental concepts (for example, Conservation of momentum, conservation of energy, conservation of charge, Coulomb's Law, Entropy, etc.). Any surprises?
{
The results I was able to achieve showed that the larger particles moved more electrons over the time period than the smaller line did. The large particles achieved a more even distribution of remaining electrtons along the line, this is likely due to the proximity of the electrons on one positive molecule to the next and thusly it can move along more easily.
}
Build simulations Here:
14true1414141414141414true14true14truetrue255 0 014truetrue255 0 014true255 0 014true255 0 01414true255 0 014255 0 014255 0 014true255 0 01414true255 0 014255 0 014255 0 014true255 0 01414true255 0 014255 0 01414true14true14true255 0 014255 0 014true255 0 01414true255 0 014255 0 014255 0 014255 0 014255 0 014true255 0 01414true255 0 014255 0 014255 0 01414true14true14true14true255 0 014255 0 014255 0 01414true255 0 014255 0 014255 0 014255 0 014true255 0 01414true255 0 014255 0 014255 0 01414true14true255 0 014255 0 014255 0 01414true14true255 0 014255 0 014255 0 01414true14trueorg.concord.mw2d.activity.AtomContainerBreidenbach_Final_Exam$0.mml