Thursday, September 18, 2008
Thurs-Day 1
AP Chem- we reviewed acid naming and then we got to the second part of our unit: the Quantum Atom.
In order to understand the current Quantum Atomic Model, you must first understand the wave and particle nature of light. Light is both an electromagnetic wave AND tiny packets of energy called quanta or photons.
We saw the relationship between the wavelength and frequency of a wave and we derived the formula for the speed of a wave. We saw that, for electromagnetic radiation, the speed of these waves is c = 3.00 x 10^8 meters per second in a vacuum (and about that speed in air).
We then discussed Planck's insight that light/energy must be "quantized" i.e. it comes in little packets of energy. Planck discovered that the energy of a single quantum/photon was proportional to the frequency of the lightwave. He experimentally determined that E = hf.
Einstein used Planck's finding to explain the "photoelectric effect", for which he won the Nobel Prize. Check out the animation on Blackboard!
I posted some tutorials on Atomic Theory that take you step by step through this unit. There is also a file with each type of problem that you'll solve in this unit so that you can use the answers as a template. There is also an animation of the Bohr explanation of emission spectra that you can preview for tomorrow's class.
Bio 6/7- we reviewed the criterion for classifying a compound as organic (MUST have C and H) or inorganic (ALL other cases). We then looked at the structures of simple and complex carbohydrates and showed that one can form a complex carbohydrate from simple sugars via the process of "dehydration synthesis". We then showed that the reverse process, "hydrolysis" causes complex carbohydrates to be broken into simple carbohydrates when the complex carbs react with water.
We learned the functions of carbohydrates (mainly for energy; plants and bacteria make cell walls out of cellulose) and lipids (long term energy storage of a very energy-rich molecule; fat is 9 Calories per gram).
We then finished up our microscope lab procedure; we'll finish that writeup next double period.
Bio 8- we reviewed the criterion for classifying a compound as organic (MUST have C and H) or inorganic (ALL other cases). We then looked at the structures of simple and complex carbohydrates and showed that one can form a complex carbohydrate from simple sugars via the process of "dehydration synthesis". We then showed that the reverse process, "hydrolysis" causes complex carbohydrates to be broken into simple carbohydrates when the complex carbs react with water.
In order to understand the current Quantum Atomic Model, you must first understand the wave and particle nature of light. Light is both an electromagnetic wave AND tiny packets of energy called quanta or photons.
We saw the relationship between the wavelength and frequency of a wave and we derived the formula for the speed of a wave. We saw that, for electromagnetic radiation, the speed of these waves is c = 3.00 x 10^8 meters per second in a vacuum (and about that speed in air).
We then discussed Planck's insight that light/energy must be "quantized" i.e. it comes in little packets of energy. Planck discovered that the energy of a single quantum/photon was proportional to the frequency of the lightwave. He experimentally determined that E = hf.
Einstein used Planck's finding to explain the "photoelectric effect", for which he won the Nobel Prize. Check out the animation on Blackboard!
I posted some tutorials on Atomic Theory that take you step by step through this unit. There is also a file with each type of problem that you'll solve in this unit so that you can use the answers as a template. There is also an animation of the Bohr explanation of emission spectra that you can preview for tomorrow's class.
Bio 6/7- we reviewed the criterion for classifying a compound as organic (MUST have C and H) or inorganic (ALL other cases). We then looked at the structures of simple and complex carbohydrates and showed that one can form a complex carbohydrate from simple sugars via the process of "dehydration synthesis". We then showed that the reverse process, "hydrolysis" causes complex carbohydrates to be broken into simple carbohydrates when the complex carbs react with water.
We learned the functions of carbohydrates (mainly for energy; plants and bacteria make cell walls out of cellulose) and lipids (long term energy storage of a very energy-rich molecule; fat is 9 Calories per gram).
We then finished up our microscope lab procedure; we'll finish that writeup next double period.
Bio 8- we reviewed the criterion for classifying a compound as organic (MUST have C and H) or inorganic (ALL other cases). We then looked at the structures of simple and complex carbohydrates and showed that one can form a complex carbohydrate from simple sugars via the process of "dehydration synthesis". We then showed that the reverse process, "hydrolysis" causes complex carbohydrates to be broken into simple carbohydrates when the complex carbs react with water.
# posted by C @ 11:44 AM 
