Tuesday, February 3, 2009
Tues-Day 1
AP Chem- took a descriptive chem quiz, which AT THIS POINT, after almost TWO years of chemistry should involve NO errors in naming or formula writing and, after dozens of examples AND explanations of each type of reaction tested, should be practically free points for everyone.
You need to take this part of the course seriously and not make any excuses. Just as many others in the past have gone from getting ZERO out of (say) 15 points to a perfect or near perfect score, so shall you. Descriptive chem is a major part of the AP exam (it's tested THROUGHOUT the exam in many ways) because one doesn't truly know or understand chemistry until one can easily and quickly see what happens when any common pair of chemicals is mixed together.
We derived the time-dependent rate equation for 2nd order kinetic processes. We then rearranged the formula to get the 2nd order half-life time formula.
We then compared the equations and graphs for 0th (not in the ref. tables), 1st (in the tables but not as convenient as our formulation), and 2nd order (directly in the ref. tables underneath the 1st order equation) kinetic processes.
We discussed rate constants and then related them to the activation energy required for a reaction. We saw the logic and components of the Arrhenius equation, which relates the value of the rate constant to the activation energy required for reaction. Plotting the rate constant for a given reaction over a range of temperatures vs. the inverse Kelvin temperature yields a negatively sloping line of slope equal to - Ea/(R). So, just multiply the line slope by -R to find the activation energy in units of Joules per mole. You should now do the HW problems based on today's lesson in case you have questions about them in class.
Bio 6/7- we began our unit on the human immune system by defining disease as a "failure to maintain homeostasis" and discussing 5 major causes of disease.
We then discussed the difference between active and passive immunity.
We continued to work on our pulse lab discussion.
Bio 8- we began our unit on the human immune system by defining disease as a "failure to maintain homeostasis" and discussing 5 major causes of disease.
You need to take this part of the course seriously and not make any excuses. Just as many others in the past have gone from getting ZERO out of (say) 15 points to a perfect or near perfect score, so shall you. Descriptive chem is a major part of the AP exam (it's tested THROUGHOUT the exam in many ways) because one doesn't truly know or understand chemistry until one can easily and quickly see what happens when any common pair of chemicals is mixed together.
We derived the time-dependent rate equation for 2nd order kinetic processes. We then rearranged the formula to get the 2nd order half-life time formula.
We then compared the equations and graphs for 0th (not in the ref. tables), 1st (in the tables but not as convenient as our formulation), and 2nd order (directly in the ref. tables underneath the 1st order equation) kinetic processes.
We discussed rate constants and then related them to the activation energy required for a reaction. We saw the logic and components of the Arrhenius equation, which relates the value of the rate constant to the activation energy required for reaction. Plotting the rate constant for a given reaction over a range of temperatures vs. the inverse Kelvin temperature yields a negatively sloping line of slope equal to - Ea/(R). So, just multiply the line slope by -R to find the activation energy in units of Joules per mole. You should now do the HW problems based on today's lesson in case you have questions about them in class.
Bio 6/7- we began our unit on the human immune system by defining disease as a "failure to maintain homeostasis" and discussing 5 major causes of disease.
We then discussed the difference between active and passive immunity.
We continued to work on our pulse lab discussion.
Bio 8- we began our unit on the human immune system by defining disease as a "failure to maintain homeostasis" and discussing 5 major causes of disease.
# posted by C @ 2:23 PM 
