Tuesday, April 7, 2009
Tues-Day 2
AP Chem- Thermo exam tomorrow counts towards your 3rd quarter average.
Do as many permutations of these problems as you can. As with thermochem, this unit is very mechanical and definition based but it does involve qualitative knowledge i.e. the meanings of the various formulas and the ability to use Le Chatelier.
We did an example that used most of the knowledge learned from this unit. We also saw the interesting connection between the Arrhenius, Clausius-Clayperon, and Van't Hoff Equations that relate the temperature changes to the ratio of rate constants, vapor pressures, and equilibrium constants, respectively. All THREE equations depend on the Boltzmann distribution of particle kinetic energies at various temperatures. We saw that all three equations involve a natural log of the ratio of the dependent variable, an energy term divided by R, the universal gas constant, and the difference between the initial and final inverse Kelvin temperatures.
We still have a day of nuclear physics and a unit on electrochemistry (along with the redox descriptive chem involved) before we end the course material.
The Spring Assignment will be given out tomorrow AND it will be posted on Blackboard.
Bio- took the VERY IMPORTANT modern genetics exam today. This material is heavily tested, along with evolution and ecology, on the Regents exam.
Be sure to have all of this quarter's labs handed in tomorrow so that you don't have a zero for their contribution towards your 3rd quarter grade.
Be sure hand in the labs on:
-Heart Rate
-Making Connections
-Menstrual Cycle Stages
-Meiosis
-Human Inheritance/Pedigree
Do as many permutations of these problems as you can. As with thermochem, this unit is very mechanical and definition based but it does involve qualitative knowledge i.e. the meanings of the various formulas and the ability to use Le Chatelier.
We did an example that used most of the knowledge learned from this unit. We also saw the interesting connection between the Arrhenius, Clausius-Clayperon, and Van't Hoff Equations that relate the temperature changes to the ratio of rate constants, vapor pressures, and equilibrium constants, respectively. All THREE equations depend on the Boltzmann distribution of particle kinetic energies at various temperatures. We saw that all three equations involve a natural log of the ratio of the dependent variable, an energy term divided by R, the universal gas constant, and the difference between the initial and final inverse Kelvin temperatures.
We still have a day of nuclear physics and a unit on electrochemistry (along with the redox descriptive chem involved) before we end the course material.
The Spring Assignment will be given out tomorrow AND it will be posted on Blackboard.
Bio- took the VERY IMPORTANT modern genetics exam today. This material is heavily tested, along with evolution and ecology, on the Regents exam.
Be sure to have all of this quarter's labs handed in tomorrow so that you don't have a zero for their contribution towards your 3rd quarter grade.
Be sure hand in the labs on:
-Heart Rate
-Making Connections
-Menstrual Cycle Stages
-Meiosis
-Human Inheritance/Pedigree
# posted by C @ 2:16 PM 
