Module 3

Module 3: Changes in Matter

Welcome to Module 3.  Remember, you may work at your own pace. All assignments for this module will be due (one week from the first day of the class). This module on matter will cover changes in matter. Understanding the changes that matter go through is important to understanding chemistry. This module will feature multimedia presentations. readings and a forum discussion.  Make sure that each assignment is completed and turned in one week from the first day of the trimester. Look at the calendar for the exact due dates.

After completing those assignments, you will take a formative quiz in class. After turning in your formative quiz, you will receive feedback and will be advised to either move ahead or redo the module. Remember, the earlier you complete a module, the earlier you will be able take the formative quiz and receive feedback.

View the media below and answer the questions that follow. An answer document will need to be retrieved from class. 

Part 1

I Can Statements
- Predict how the rate of a chemical reaction will be influenced by changes in temperature, pressure, and concentration. 
- Explain how the rate of reaction will depend on the concentration, pressure, nature of the reactants and temperature.

1. Ever driven a bumper car before? Think about all of those padded cars driving around and hitting each other. Imagine that every 1 minute, there are 10 collisions. Every minute, 10 cars bump into each other. If you wanted to increase the number of times that cars bumped into each other (maybe 20 times every minute), what two changes could you make to the bumper cars? Again, what 2 changes could be made to the bumper cars to get them to run into each other more often in the same amount of time?

Below is a presentation that discusses how the speeds at which chemicals react can be changed.

Click on the site below and read more information about ways to change reaction rates.

Chem4Kids:Reaction Rates

2. Explain collision theory.

3. Fill in the chart below. A couple model answers have been provided.

  What is it?
 How does it impact the rates of reactions?
 Temperature is a measure of the kinetic energy (movement) of atoms


Surface Area
   As surface area increases, the speed of the reaction increases


4. Using the bumper cars analogy, why does increasing temperature increase the speed of chemical reactions?

5. Using the bumper cars analogy, why does increasing concentration increase the speed of chemical reactions?

6. Click
here and take a short quiz on reaction rates. Record the number of questions you answered correctly.

7. Use what you have learned above to explain why people use refrigerators.

Part 2

I Can Statements
- I can explain the Law of Conservation of Matter.

The video below is a compilation of some of the better internet videos on the Law of Conservation of Matter.

8. In your own words, what is the law of conservation of matter?

9. If 100 g of liquid water is boiled until it all turns into a gas, what would the mass of the water as a gas be?

10. If 10 grams of sodium (Na) and 10 grams of chlorine (Cl) are reacted to produce Sodium Chloride (Na + Cl--> NaCl), how many grams of Sodium Chloride (NaCl) would be produced?

11. Imagine 50 atoms of Hydrogen (H) and 25 atoms of Oxygen (O) are reacted to produce water (H
2O). How many atoms of hydrogen and how many atoms of oxygen would make up the water that was produced?

Part 3
On the left there is a link for the "Module 3 Discussion Forum". Be sure to click on it and post a response. 

Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 Unported License.
Original copyright: ©2012 Daniel McIlhenney