Rubber Band Thermodynamics Essay

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Rubber Band Thermodynamics Essay

rubber band (5-8 cm relaxed length)

Pre-write Activity:

Hold the rubber band by its ends in its relaxed state. Bring the rubber band against your forehead or lips and let it come to the same temperature as your skin. Quickly stretch the rubber band to three or four times its relaxed length and note any changes that occur (besides the rubber band getting longer. Without letting go the ends let the rubber band contract quickly to its relaxed length and note any changes that occur (besides the rubber band getting shorter).

Pre-write Observations:

What did you observe when the rubber band was stretched?

What did you observe when the stretched rubber band relaxed?


Construct a 1-2 pg double spaced essay that answers the following questions. Please make sure that you explain the science behind your reasoning using the correct terminology used in class. Be mindful of grammar and mechanics. This essay should be written in the third person.


The following words should be used and explained throughout the course of your essay. DO NOT list definition, if you are explaining the science behind the concept then all of these words should come up in your discussion.

Kinetic energy Potential energy Exothermic process

Endothermic process System Surroundings

Enthalpy Energy First Law of Thermodynamics

Writing Prompt:
Assume that the rubber band can exist in one of two states: R (relaxed) and

S (stretched). In answering the following questions, consider the rubber band as the system.

1. Summarize the activity and the observations that you made in your pre-write observations.

2. Based on your observations, what is the sign of enthalpy of the rubber band (Hsystem ) for the R  S process in the rubber band? Explain how you reached this conclusion.

3. Based on your observations, what is the sign of enthalpy of the rubber band (Hsystem ) for the S  R process in the rubber band? Explain how you reached this conclusion.

4. How does this activity support the first law of thermodynamics? Explain your answer.
5. Concluding paragraph
Revision Check List

Revision does not mean "recopying" what you've already written. Revision means making changes to the content of the paper so that every word, sentence, and paragraph makes sense to the reader.

Three areas in particular to examine as you consider how to improve the content and style of your essay are as follows:
1. Clarity: Is the essay clearly and logically written?
Unity: Do all the paragraphs relate to the central idea?
Coherence: Do the ideas flow smoothly?

Revision Check List

1. Does the essay cover everything the prompt asked for?
2. Does each paragraph do what it's supposed to do?

• The opening paragraph should state the central idea.

• The paragraphs in the body should support the central idea.
•The closing paragraph should reemphasize the main thoughts and the central idea.

3. Will a reader be able to follow the essay?

•Ideas should be laid out in a logical order.

•Transitional words and phrases should lead the reader clearly from one thought to another.
•Paragraphs should be in an effective order.

4. Do all the facts, examples, and reasons support the central idea?

• Details should be fully developed and related to the topic.

• Unnecessary words and phrases should be eliminated.

5. Are sentences clear and effective?

• A variety of sentence types should be used to keep the essay interesting.

• Sensory details should be used to improve description.

Peer Editing Guidelines and Example

Be respectful. Never use discouraging or demeaning words when you peer edit.

Your goal is to help your peer, not embarrass or criticize. Remember others are

editing your work as well. Think of how you would like to be treated.
Be positive. Always point out strengths before discussing things that could be

improved upon.

Be specific. Always expand, explain, and give specific feedback. Point out

exactly where errors occur so that the writer knows what you are referring to.

Do not rewrite for them. You may be tempted to just rewrite the paragraph for your peer. However, this will not help them learn. Point out specific areas that could be revised, offer specific suggestions, but let your peers make revisions on their own.

Here is an example of a helpful and unhelpful comment when looking to see if the writing is coherent.
Editor’s Comments:

Unhelpful: This paragraph has no transitions so it is unorganized and confusing.

Helpful: Here is an area where I really think you can improve your paragraph drastically with some revision. Consider organizing your main points so that you have 3-4 main points you want to make. Then introduce each point with a transition word or phrase so that the reader can follow your main ideas.

Please identify that you have peer edited a paper by signing the upper right hand corner of the first page in the same color ink that your edits were made in.

Proofreading Check List
Proofreading is different from revision. Whereas revision focuses on improving the content of the essay, proofreading deals with recognizing and correcting errors or punctuation, capitalization, spelling, and grammar.
1. Have all fragments and run-on sentences been eliminated?
2. Does the essay use correct paragraphing and indentation?
3. Is there agreement between subjects and verbs? Between pronouns and antecedents?
4. Are pronoun references clear?
5. Has correct verb tense been used correctly and consistently?
6. Have commas, apostrophes, and semicolons been used correctly?
7. Have words been capitalized correctly?
8. Are there any sentences that could be combined to provide sentence variety?
9. Does the essay show interesting and accurate word choice?
10. Has a dictionary or spellchecker been used to correct spelling errors?


Writers proofreading marks are in ____________________________

Proofreaders (____________________) marks are in ______________________

lease cut and attach this to your draft when you turn in your final paper

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