This Course Does Not Require a Final Exam s2

SCI122: Chemistry w/LAB

THIS COURSE DOES NOT REQUIRE A FINAL EXAM

SYLLABUS

READ THESE INSTRUCTIONS NOW!

1.) YOUR ASSIGNMENTSARE ON YOUR SYLLABUS SO…

a.) Download & Save it

b.) Read it

c.) For textual readings, use the “Access Class Downloads” link on your class page. Any additional links will be on your syllabus.

2.) COMPLETING WORK

a.) Carefully read and get an understanding of what you are being asked to do

b.) Keep work organized by week, clearly labeled and typed or copy/paste onto your syllabus

c.) Math and hand done projects: photograph, scan or screenshot and copy/paste to your syllabus.

d.) Keep images small so your file isn’t too large to submit or save work as a PDF.

e.) Use your class downloads and links as directed. Do not “Google” and plagiarize.

f.) Go to "Student Services - IPAD/APPLE/GOOGLE Support" to learn to submit work in other formats.

3.) SUBMITTING WORK

a.) YOU MUST SUBMIT ALL SIX WEEKS AT ONCE. Go to the website and select “Student Services” and then “Submit Work”.

b.) You must have completed all 6 weeks of work AND placed it on your syllabus to submit your work for grading using the online form.

c.) You havetwo attempts at receiving a passing grade of "C" or better so submit your full effort original work.Work sent without a syllabus and/or disorganized will be rejected and issued a failing grade.
d.) MAILING WORK:You may also COPY your work and MAIL the originals to IOHS 1803 W 95TH Street #263 Chicago, IL 60643. Mailed work will not be returned and you must include your syllabus.

4.) RECEIVING GRADES:

a.) The evaluator will grade each weekly assignment and average your grades.

b.) You will receive a reply in about 5 business days. Do not call or email asking for us to verify your work.

c.) If you have not received a reply in a week or need help, email “Homework Help” from website

d.) Your 5 weekly grades must average to a 2 (“C”) or better to receive your credit.

e.) FINAL EXAMS: Go to “Student Support – Request Final Exam” after you submit (Math & World LANG)

All components of your course must be completed by the end of the 8th week from the time of your registration. If you have a medical emergency or disability preventing you from completing your class, contact “Homework Help” and send an email to request up to a 2-week extension. For urgent matters call or text 773-499-2668 anytime.

Plagiarism Statement

I understand that I must use research conventions to cite and clearly mark other people's ideas and words within my paper. I understand that plagiarism is an act of intellectual dishonesty. I understand it is academically unethical and unacceptable to do any of the following acts of which I will be immediately expelled without refund:

·  To submit an essay written in whole or in part by another student as if it were my own.

·  To download an essay from the internet, then quote or paraphrase from it, in whole or in part, without acknowledging the original source.

·  To restate a clever phrase verbatim from another writer without acknowledging the source.

·  To paraphrase part of another writer's work without acknowledging the source.

·  To reproduce the substance of another writer's argument without acknowledging the source.

·  To take work originally done for one instructor's assignment and re-submit it to another teacher.

·  To cheat on tests or quizzes through the use of crib sheets, hidden notes, viewing another student's paper, revealing the answers on my own paper to another student through verbal or textual communication, sign language, or other means of storing and communicating information--including electronic devices, recording devices, cellular telephones, headsets, and portable computers.

·  To copy another student's work and submit the work as if it were the product of my own labor.

Key Info – When doing your LABS
·  The scientific method is a way to ask and answer scientific questions by making observations and doing experiments.
·  The steps of the scientific method are to:
o  Ask a Question
o  Do Background Research
o  Construct a Hypothesis
o  Test Your Hypothesis by Doing an Experiment
o  Analyze Your Data and Draw a Conclusion
o  Communicate Your Results
·  It is important for your experiment to be a fair test. A "fair test" occurs when you change only one factor (variable) and keep all other conditions the same.
Week 1
Your Textbook is Online – follow the link
http://www.chem1.com/acad/webtext/pre/index.html
Introduction to Chemical Science
·  What is the difference between chemistry and physics? Explain in your own words.
·  What ways do engineering, economics, and geology relate to Chemistry? Explain in your own words.
·  Define the following terms and classify them as primarily “microscopic or macroscopic” concepts: element, atom, compound, molecule, formula, structure.
·  Describe “energetics” and “dynamics”.
ADD RESPONSE/S/ HERE
Matter: its classification and properties
·  What distinguishes “heterogeneous” matter from “homogeneous” matter? Give your own example.
·  Describe the following separation processes: distillation, crystallization, liquid-liquid extraction, chromatography,
ADD RESPONSE/S/ HERE
Understanding density and buoyancy
·  Describe the two factors responsible for the 4°C density maximum of water
·  Explain why weighing a solid object suspended in a fluid yields a smaller value than its “true” weight.
·  What is the purpose of a hydrometer and how does it work? Explain in your own words.
ADD RESPONSE/S/ HERE
LAB I
DENSITY COLUMN
Make a density column with many liquid layers using common household liquids. This is an easy and colorful science project that illustrates the concept of density.
Density Column Materials
You can use some or all of these liquids, depending on how many layers you want and which materials you have handy. These liquids are listed from most-dense to least-dense, so this is the order in which you pour them into the column.
1.  honey
2.  corn syrup or pancake syrup
3.  liquid dishwashing soap
4.  water (can be colored with food coloring)
5.  vegetable oil
6.  rubbing alcohol (can be colored with food coloring)
7.  lamp oil
Make the Density Column
Pour your heaviest liquid into the center of whatever container you are using to make your column. If you can avoid it, don't let the first liquid run down the side of the container because the first liquid is thick enough it will probably stick to the side so your column won't end up as pretty. Carefully pour the next liquid you are using down the side of the container. Another way to add the liquid is to pour it over the back of a spoon. Continue adding liquids until you have completed your density column. At this point, you can use the column as a decoration. Try to avoid bumping the container or mixing its contents.
The hardest liquids to deal with are the water, vegetable oil, and rubbing alcohol. Make sure that there is an even layer of oil before you add the alcohol because if there is a break in that surface or if you pour the alcohol so that it dips below the oil layer into the water then the two liquids will mix. If you take your time, this problem can be avoided.
WRITE WHAT YOU OBSERVED
EXPLAIN: How the Density Column Works
You made your column by pouring the heaviest liquid into the glass first, followed by the next-heaviest liquid, etc. Which liquid has the most mass per unit volume or the highest density? Some of the liquids don't mix - why? Include photo of you doing your project.
ADD LAB WITH PHOTOS HERE
Week 2
Energy, heat, and temperature: an introduction
·  What is the difference between kinetic energy and potential energy? Explain in your own words.
·  Define chemical energy and thermal energy.
·  What is meant by “heat” and “work”? Give an example of each in your own words.
·  Describe the physical meaning of temperature?
·  What is a temperature scale?
·  Describe the Kelvin temperature scale.
·  How are heat capacity and specific heat measured?
ADD RESPONSE/S/ HERE
Quick lab
Just about everyone has used rubber bands, but few people have taken the time to observe the less obvious properties of these everyday objects. In this activity you will examine the thermal properties of rubber, that is, the behavior of rubber as it relates to heat, a form of energy.
In the first experiment you will attempt to detect heat flow into or out of a rubber band. To do this, you need a rather sensitive heat detector. Fortunately, you have such a detector with you at all times. Surely, you've felt the heat of a flame or the cold of an ice cube. Therefore, you know that your skin is sensitive to heat flow. In this experiment, you will detect heat flow using some of your most sensitive skin, that on your forehead or on your lips.
1.  Place your thumbs through the heavy rubber band, one on each end. Without stretching the band, hold it to your forehead or lip. Does the band feel cool or warm or about the same as your skin? Repeat the test several times until you are sure of the result.
2.  Move the rubber band slightly away from your face, so it is not touching your skin. Quickly stretch the band about as far as you can and, holding it in the stretched position, touch it again to your forehead or lip. Does it feel warmer or cooler or about the same as it did when it was relaxed?
3.  Move the stretched rubber band away from you face. Quickly let it relax to its original size and again hold it to your skin. Does it feel warm or cool?
4.  Repeat the stretching and testing, and relaxing and testing several times until you are sure of the results.
An object feels cool or cold to you when heat flows from your skin to the object. Conversely, an object feels warm or hot when heat flows from the object into your skin. If the stretched rubber band feels cool, then it absorbs heat from your skin. If it feels warm, then it gives off heat to your skin. If the band feels neither warm nor cool, then there is no detectable heat flow. These three cases can be represented as follows:
Case 1. / Relaxed Band + HeatStretched Band
Case 2. / Relaxed BandStretched Band + Heat
Case 3. / Relaxed BandStretched Band (No Heat)
Which of these three cases best describes what you observed?
ADD LAB RESPONSES HERE
Units and dimensions
·  Explain the meaning and use of unit dimensions.
·  What qualities are needed to define a temperature scale?
·  Explain how a Torricellian barometer works.
ADD RESPONSE/S/ HERE
The meaning of measure
·  Give one example of a measured numerical value and explain what distinguishes it from a “pure” number.
·  Why is the relative precision of a given measurement generally more useful?
ADD RESPONSE/S/ HERE
Significant figures and rounding off
·  What is the purpose of rounding off?
·  How do you round off a number whose second-most-significant digit is 9?
ADD RESPONSE/S/ HERE

How can I calculate the energy required to cause a temperature rise?

The specific heat of water is 1.0 cal/g°C. How much energy is required to raise the temperature of 25.1 g of water by 72.0 degree Celsius?
Follow these steps.
1.  What is the unknown? Your problem asks "How much energy...?" The units aren't specified, but since you spot 'calories' in the given information, it will probably be easiest to get your answer in calories.
2.  What information is given? You know that:
o  the specific heat is 1.0 cal/g°C
o  the mass of water is 25.1 g
o  the temperature change is 72.0°C
3.  How is the information in the problem related to the unknown? The relationship between heat and temperature change is
heat = mass × specific heat × temperature change
4.  Do the math. Now you're ready to do the calculation itself:
heat = (25.1 g)(1.0 cal/g°C)(72.0°C)
5.  Is the final answer in the correct units? You want only calories. All other units should 'cancel' in the calculation somewhere.
6.  Is the size of the answer reasonable? Your reasoning should go something like this: The specific heat means that it takes 1.0 calories of heat to warm 1 g of water up by 1°C. So it should take 25.1 calories to warm up 25.1 g of water by 1°C. And it should take 72.0×25.1 calories to warm up 25.1 g of water by 72.0°C.
You can also check the answer by working the problem backwards. For example, take the calories just calculated and divide them by the temperature change and the grams of water; do you get a specific heat of 1.0 cal/g°C?
APPLICATION ASSIGNMENT: Now YOU do the calculations.
The specific heat of water is 2.0 cal/g°C. How much energy is required to raise the temperature of 30.0 g of water by 80.0 degree Celsius?