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:{_Mary Joseph___________________________}
1. State the Question you are investigating:
{How electrolysis cell work
}
2. Explain why this quesion is interesting:
{It is an interesting question because it shows how the molecule (the positive and the negative charge attracted to each other)sepatrate and go to their respective electrodes( although not all of them but majority does). that means the negative charge go to the positive electrode(cathode) and positive charges goes to the negative electrode which is anode)
}
3. Explain why this quesion is specific enough to be testable with simulation so as to give a definite answer.
{It can be testable by simulation as all the necessary tools required to build up the simulation can be found. But the particles induced positive and negative charges have to be used to make it work as a rectangular block canno be used since it can not be charged ( making it positive or negative electrode)
}
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 reason why I build this simulation is a back up to the electrolysis cell presentation I did! I had some pictures but not simulation, so I wanted to work on it and see how is it going to be. At first I used rectangular block to represent electrodes but I discovered that they can not be charged, therefore the negative and positive ions will not move to their respective electrodes. then i tried to use a chain of molecules, but it will never go verically. therefore i had to use particles attached together by putting arestrain on them and a liitle damping force.
}
5. What variables will stay fixed for the experiment and how did you choose the values for those variables?
{The restarin on the molecules have to remain constant and at a very high value ( above 4000) as small restarain will not keep the particles held together.
}
6. What variable will you change to answer the question? Over what range of values will you test the effect of the variable?
{the number of particles (ions) can change. the temperature can also change but has to be low.
}
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 kinetic enenrgy of the particle can be monitored (induced by the heat bath)
}
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.
{In this simulation, it does not matter. th esimulation can be done either way, with or without the heat bath.
9. When you actually run the simulation -- will you do it with the heat bath on or off? Explain.
{The heat bath can either be on of off. But when the heat bath is on the kinetic energy o fthe particles increases compared to when the heat bath is off, therefore making the simulation more faster when the heat bath is on.
}
10. Provide directions for someone else to run your simulations to reproduce the experiments you got, and describe the results you obtained:
{Start by builing the electrodes using particles. put the particles close to one another in a verticle posion. build two electrodes that are separated in a whatever distance that you want. Click on one particle to see properties of these particles. Make sure they have the same mass, add restrain on them ( it should be equal in all particles). Do the same thing for the other electrode. Add positive charges on one of your electrode and this will be your cathode and negative charges on the other electrode which will be the anode. Then add positive ions and negative ions in the container to represent your electrolyte. finally add the heat bath and set it to any temperature bellow 400k. Now you can run the simulation to see how the negative ions will move to the cathose and how the positive ions will move to the anode. It might not be 100 % efficient, but most of the ions wil split and move to their respective ions.
}
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?
{this simulation represent the change of electric energy to chemical energy.
}
Build simulations Here:
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