Thursday, March 29, 2007
Thurs-Day 3 + Honors Exam Change
Honors: NOTE: since the juniors are off tomorrow, I am CHANGING the date of our test to next TUESDAY. So, you have one extra day to practice/prepare. I will be in at about 7:30AM on Friday for extra help and at about 8AM on Monday (on Monday, I will NOT be in Room 229 but rather in Room 237.) I will not be available for extra help after school (for the first time ever) on THIS Friday afternoon but I will be available for extra help after school, as usual, on all other days.
We finished the 5 factors that can alter the rate of chemical reactions; we explained each factor (as you will DEFINITELY do on your next test) in terms of the effect on (1.) collision frequency (2.) kinetic energy/force of collisions with respect to the activation energy barrier (3.) orientation/angle of collision with respect to alignment of molecules for an effective collision. We related each of these terms to the ONE measurement that is 100% SYNONYMOUS with reaction rate: the NUMBER of EFFECTIVE collisions PER SECOND.
We then revisited enthalpy diagrams and labeled each of the relevant quantities or "arrows" on the diagram.
More of that tomorrow and then it is on to the Equilibrium part of the unit.
Regents: we did some quantitative calculations involving enthalpy diagrams. We also labeled the arrows in the enthalpy diagram for an uncatalyzed and a catalyzed reaction. Make sure that you can draw those diagrams and know what each arrow represents. There will likely be a quiz next Tuesday.
AP: we wrapped up the Thermo Unit by doing some problems that relate delta G standard to the equilibrium constant, K, at a given temperature. We also discussed "coupled" reactions, which are so important in biochemistry and in chemical engineering.
We then did a generic problem in which Hess's Law was applied for delta G and for delta H so that delta S of the reaction could be obtained.
Practice all of the worksheet problems and tutorials this weekend so that you are prepared for one of the very few fourth quarter tests.
I will post your vacation assignment: three AP Part II exams and Project KARMA, a comprehensive correction of any past test errors from this year. Project KARMA was THE main reason for the unanimous fives, last year. Without the diligent and meticulous effort applied to that project, last year's class would very likely have had four 5's, some 4's and a FEW 3's (ack!). You will notice that the AP exams that we will take from the end of April through Test Day become SIGNIFICANTLY easier once you have corrected your past errors to the point of full understanding of why you made the error in the first place and of how you can recognize a similar question type and avoid that error in the future.
We finished the 5 factors that can alter the rate of chemical reactions; we explained each factor (as you will DEFINITELY do on your next test) in terms of the effect on (1.) collision frequency (2.) kinetic energy/force of collisions with respect to the activation energy barrier (3.) orientation/angle of collision with respect to alignment of molecules for an effective collision. We related each of these terms to the ONE measurement that is 100% SYNONYMOUS with reaction rate: the NUMBER of EFFECTIVE collisions PER SECOND.
We then revisited enthalpy diagrams and labeled each of the relevant quantities or "arrows" on the diagram.
More of that tomorrow and then it is on to the Equilibrium part of the unit.
Regents: we did some quantitative calculations involving enthalpy diagrams. We also labeled the arrows in the enthalpy diagram for an uncatalyzed and a catalyzed reaction. Make sure that you can draw those diagrams and know what each arrow represents. There will likely be a quiz next Tuesday.
AP: we wrapped up the Thermo Unit by doing some problems that relate delta G standard to the equilibrium constant, K, at a given temperature. We also discussed "coupled" reactions, which are so important in biochemistry and in chemical engineering.
We then did a generic problem in which Hess's Law was applied for delta G and for delta H so that delta S of the reaction could be obtained.
Practice all of the worksheet problems and tutorials this weekend so that you are prepared for one of the very few fourth quarter tests.
I will post your vacation assignment: three AP Part II exams and Project KARMA, a comprehensive correction of any past test errors from this year. Project KARMA was THE main reason for the unanimous fives, last year. Without the diligent and meticulous effort applied to that project, last year's class would very likely have had four 5's, some 4's and a FEW 3's (ack!). You will notice that the AP exams that we will take from the end of April through Test Day become SIGNIFICANTLY easier once you have corrected your past errors to the point of full understanding of why you made the error in the first place and of how you can recognize a similar question type and avoid that error in the future.
# posted by C @ 5:34 PM 
