May 5 through May 12
*FOR MONDAY (5/12): Each group of 4: bring your materials to start our RUBENS TUBE Project: Go to Home Depot or similar and get
- 1/16 inch drill bits (at least 2 of them)--about $3
- 2 inch diameter PVC pipe, will cost about $5. (you will only use a about 6 inches of length), so one PVC tube can be used for both groups--about $5.
- (1) 2 inch-to-2 inch rubber coupling (ask for it at Home Depot)--about $4
- Glue gun
- 2 inch speaker (from a cheap Ipod dock--costs about $10 at Seven Eleven)
- Hack saw
- Drill (I will bring one, but we need two of them)
SET UP A WEBPAGE FOR YOUR GROUP--ALL MEMBERS NEED LOGIN AND PASSWORD INFORMATION!
-Start Safety Section in Webpage (Details in Project Handout)
IN-CLASS:
Monday (5/5) - Collect HW packet; go over last exam; discuss next project (funding. etc.);
Wednesday - Global climate change reflections; Element Tile Presentations; begin thermochemistry (3, 4, 12,13);
Friday - Continue Thermochemistry (changes of state); gather project materials over weekend.
HOMEWORK: Turn in homework packet the day of the exam.
Thermochemsitry Packet (1-6, 8) (Due 5/9)
Thermochemsitry Packet (7-9-16) (Due 5/12)
Climate change reflection: Do you believe climate change is real? Why or why not? Why do you (or don't you) believe global climate change is important to the future decisions you will make as an adult? Do you believe that individuals have a responsibility to change their lifestyle to help the planet cope with climate change? What is (or what would be) the most challenging aspect to change in your life in addressing climate change? (>250 words) (Due 5/12)
Memorize the Three Laws of ThermodynamicsFirst Law of Thermodynamics
The first law of thermodynamics is often called the Law of Conservation of Energy. This law suggests that energy can be transferred from one system to another in many forms. Also, it can not be created or destroyed. Thus, the total amount of energy available in the Universe is constant. Einstein's famous equation (written below) describes the relationship between energy and matter:
E = mc2
In the equation above, energy (E) is equal to matter (m) times the square of a constant (c). Einstein suggested that energy and matter are interchangeable. His equation also suggests that the quantity of energy and matter in the Universe is fixed.
Second Law of Thermodynamics
Heat cannot be transfer from a colder to a hotter body. As a result of this fact of thermodynamics, natural processes that involve energy transfer must have one direction, and all natural processes are irreversible. This law also predicts that the entropy of an isolated system always increases with time. Entropy is the measure of the disorder or randomness of energy and matter in a system. Because of the second law of thermodynamics both energy and matter in the Universe are becoming less useful as time goes on. Perfect order in the Universe occurred the instance after the Big Bang when energy and matter and all of the forces of the Universe were unified.
Third Law of Thermodynamics
The third law of thermodynamics states that if all the thermal motion of molecules (kinetic energy) could be removed, a state called absolute zero would occur. Absolute zero results in a temperature of 0 Kelvins or -273.15° Celsius.
Absolute Zero = 0 Kelvins = -273.15° Celsius
The Universe will attain absolute zero when all energy and matter is randomly distributed across space. The current temperature of empty space in the Universe is about 2.7 Kelvins.
QUIZ:
- Memorize the Three Laws of Thermodynamics; be able to solve specific heat capacity problems; be able to solve change of state problems (Hvap, Hfus, Hcond) (17.1, 17.2, 17.3) (5/14/2008)
PROJECT:
Element Tile (Due every Monday)
LOOKING AHEAD: Gas Laws, Acids and Bases, Rates and Equilibrium, Nuclear Chemistry, Quantum Chemistry
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