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Potential Energy Profile
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Module 1) Potential Energy Profile
Synopsis: This module describes the progress of a reaction in terms of its potential energy through the use of a potential energy profile. It describes the differences between exergonic and endergonic reactions, displaying the ∆G, transition states, activation energy, and relation of reactants to products on various graphs.
• I made several superficial corrections to the module
• Length: Good
• Accuracy: Good
• Are images vital to understanding? Yes
• Are meaningful legends provided? Yes, and if there isn’t a legend the graph is labeled well
• Is each figure referenced by a number in text? No
• Can I suggest any improvements to the images? Add number references
• Are additional images necessary?/ describe images that would be helpful: No, adequate number of images
• Is the presentation of results easy to follow? Yes, but the introductory paragraph could be improved. Needs more explanation of what potential energy is, and how it relates to free energy
• Does each paragraph have a topic sentence/ are they related well/ are there any paragraphs I suggest for review? Introductory paragraph and organization could be improved. For example, have titles for each paragraph/section. Also it is missing practice problems
• Are there distracting grammatical/spelling errors: I fixed all of the ones I saw
• Is there logical organization?/ Suggestions: Just what was stated above; titling the sections would help
I fixed obvious mistakes in the module and performed a plagiarism check and figures check on module 1. I found no plagiarism.
Posted 17:07, 6 Mar 2011
Review 1: Potential Energy Diagrams
1.Synopsis: The topic of module is to explain potential energy diagrams. Its goals seem to be to describe the typical elements of a potential energy (PE) diagram, relate PE diagrams to multistep reactions and to explain the difference between exergonic and endergonic reactions. It also seeks to relate Gibbs energy and Activation energy to these diagrams and the physical significance of each. There is also mention of reaction reversibility and how it can be determined using PE diagrams. As one might expect there are a number of user-generated graphs of PE vs. Reaction coordinate that describe the different elements and types of PE diagrams that may be seen. The article incorporates concepts form related topics (Elementary Reactions, Transition State Theory) into its explanation of PE diagrams.
2. Vet 2 Ready?
-This module is not yet ready for Vet 2. Though there are no misspellings and the information is accurate the organization is lacking. As mentioned below its sections need to be broken up by headings. As it now, the module reads like a smattering of knowledge and not like a polished article dealing with PE diagrams. There are also no example problems; which would be good to have before going to Vet 2.
3. Review of Details
-This module provides a detailed description of PE Diagrams. The length is appropriate given the different types of PE diagram features that are covered. The English used is correct. However, the format does not fully adhere to chemwiki guidelines. First, subheading are not used to break up the material. Second, though many related chemwiki articles are linked they are also referred to (i.e. "See: Transition State Theory). This is not necessary. Anyone using chemwiki will recognize the link and does not need to be directed to it. There are a few links to existing chemwiki pages that should be made. For instance a link should be made to the article on Gibbs Free Energy.
1. For this module the diagrams are absolutely essential in understanding PE diagrams. They relate the explanations in the text of the module to the significance in terms of PE diagrams. As important as figures are for this topic they are somewhat lacking (see below).
2. A meaningful legends is only provided for the first diagram, all other diagrams lack legends, but are rather label with words and arrows. The legend is absolutely crucial to understanding the first diagram and the other diagrams make a reasonable amount of sense given their labeling.
3. The figures are NOT reference in the text in any way.
4. There are numerous ways in which the images could be improved. First, each diagram should use the same font and format. Within diagrams there are multiple fonts used, which looks very unprofessional. In addition, identical elements that appear in multiple diagrams should be the same color. For example, “reactant(s)” appears in every diagram but it has a different color behind it in each instance. The diagrams would be easier to use if the colors were consistent throughout. Also, the second diagram (about multistep processes) has arrows that look as though they have been drawn in MS Paint which, aside from looking bad, do make the diagram a little confusing. This diagram also has the numbers 1 and 2 on but there is no explanation of what these pertain to. I assume they indicate steps of the reaction but this should be made explicit. The first image could be enhanced by including, either in the legend or in the diagram itself, the proper notation for each feature (i.e. for “5. The difference in potential energy between the reactant and the product” could also include the label (delta)G [though of course you would want to use the Greek symbol delta]). Small changes such as these could drastically improve the effectiveness of the module.
5. There are not any additional images that would improve this module. The ones that are already present serve their purpose but need to be improved (see 4 above).
1. There is no data that is organized into tabular form.
2. As mentioned before, there are no tables so this doesn't apply.
3. As mentioned before, there are no tables so this doesn't apply.
4. As mentioned before, there are no tables so this doesn't apply.
5. Tables of data are not recommended for this module. As a descriptive topic the best way to supplement the descriptions is with diagrams, which this module does have.
1. No, the module does not follow the most logical progression, though the general direction is good.
2. Each paragraph has a topic sentence and the author does a decent job of sticking to the general idea laid out in each topic sentence.
3. There were no major spelling or grammatical errors that were evident. On issue I had was in the use of capitalization of certain terms and not others. For instance "Rate-Determining Step" is capitlaized where as "elementary steps" is capitalized on in its first usage. I would suggest only capitalizing phrases like "Arrhenius Equation" because they relate to concepts and theories that are named for someone.
4. Though all the information in the article is pertinent and relatively effective the format is lacking. The information would be more effectively conveyed if the module was broken up into sub-headings. One heading could be for "Reaction Rates" and would include the two paragraphs that follow the first diagram. A second heading could be for "Elementary Steps and Transition State Theory." This is only one way that one could choose to organize the module, but I think heading are a must. This way when someone accesses the module and wants to know about a specific aspect of PE diagrams they can more easily find it.
4. Fix One Mistake
- The mistake that I fixed was a fairly minor one. In the final paragraph before the endergonic reaction diagram the text read "G0, " with the comma in the super script. I moved it down to where it should be.
5. Plagarism Check
-article checker - no plagiarism suspected (all suspected instances link back to the URL of the chemwiki article in question
-dustball– no plagiarism suspected (all suspected instances link back to the URL of the chemwiki article in question
-plagarismchecker- no plagiarism detected
6. Figure Check – no images taken from other sites
Posted 21:45, 7 Mar 2011
REVIEW 1 - Janelle Defiesta
Potential Energy Profile
A Potential Energy Profile, which is a diagram that describes the mechanism of a reaction, holds many different elements and applications. The diagram places important aspects of potential energy (PE of the reactant; activation energy; transition state; energy difference between the activated complex and products; PE difference between reactants and products; intermediates; and the PE of the product) into a visual format. To understand the diagram, it is important to understand the chemistry concepts behind the Potential Energy Profile and why each component of the diagram is important. The Potential Energy Profile is an important aspect of chemistry because it has a wide range of applications: understanding the direction of the reversible rate; understanding the difference between elementary and stepwise reactions; finding which step is the rate determining step; visualizing catalyst affects of potential energy; and understanding Gibbs free energy (energonic and exergonic reactions).
2. Is the Module ready to go to Vet2 level?
The module is not ready for Vet2 level because it still needs a lot of refining. Although all the information is accurate, the module needs a lot of work in terms of grammar and organization. I did not find any spelling errors, but the module was difficult to read due to grammatical issues. Organization also made reading the module difficult and I think it could be easily improved by using labels and categorizing the different important aspects of the Potential Energy Profile.
3. Review Details:
English: Correct spelling, but punctuation and grammar needs work.
Accuracy: Information was correct.
Figures Questions (if applicable)
1. Yes, the figures are very critical for understanding the material.
2. The figures are properly labeled, but there aren’t any figure legends in the module. To make the figures more meaningful, I would describe the figure properties in short captions directly attached to the figure instead of hidden within the module paragraphs.
3. No, none of the figures are referenced by number (it just says in the graph below, etc).
4. To give the module a professional look, the images should have a consistent format. For example, some figures consist of numeric labels and describe the numbers within the following text, while other figures directly label each component with text. Properly labeling each figure will also improve the quality: Potential Energy should be labeled on the y-axis of each graph; and using proper symbols on figures (such as Δ instead of “delta”). I also think the second figure should be modified because it looks very unprofessional. Adding references to the figures would also be beneficial.
5. To help understand the Potential Energy Profile with the help of a catalyst section, creating a figure to include the Potential Energy Profile with a catalyst would be very beneficial in addition to linking the Activation Energy & Gibbs Free Energy pages in the module.
Tables Questions (if applicable)
1. No, the presentation of results was not easy to follow. The beginning of the module was easy to follow (the first definition of the Potential Energy Diagram and the diagram components sections), but as I continued to read the information started jumping from one topic to the next with little or no transitions. This lack of fluidity made the module difficult to follow.
2. Each paragraph contains its own topic.
3. Yes, there were a few grammatical errors that made the module hard to read and follow.
4. Due to topic jumping, the organization of this molecule had no logic or fluidity. The organization of the module could be improved by providing topic labels and categorizing the module's components. A beneficial way of categorizing the information would be the following: definition of a PE Profile, components of the PE profile, and applications.
4. Fix one mistake in the Module:
I linked “Definition of a Reaction Rate”, “Activation Energy” and “Transition State Theory”.
I also changed a few sentence/grammar errors:
Original: Both of them can be used to measure how far the reactions from the equilibrium
Edit: Both of them can be used to measure how far the reaction is from equilibrium.
Original: As the reaction proceeds, the potential energy arises to a maximum and the reactants form a cluster of atoms, called the activated complex.
Edit: As the reaction proceeds, the potential energy rises to a maximum and the reactants form a cluster of atoms, called the activated complex.
5. Plagiarism Checks:
No plagiarism results.
No plagiarism results.
No plagiarism results.
No plagiarism was found from the book.
Compare 3 keywords in google:
Compared: potential energy profile
Results: No similar articles were found.
6. Figure Check:
No images were taken from commercial sites
Posted 22:55, 7 Mar 2011
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