Friday, October 30, 2009
Thurs-Day 2
Bio 3/6- we discussed the important overall results of mitosis/cytokinesis. We noted that mitosis/cytokinesis is required for
1.) the GROWTH and/or development of any multicellular/complex organism
and
2.) the REPAIR of damaged cells/tissues/organs of any complex organism.
We then discussed cancer, which is uncontrolled cell division, and how cancer cells harm an organism by using up most of its needed nutrients thus depriving normal cells of nutrients/sources of energy.
AP Chem- We discussed the two types of calorimeters and the relationship between heat and internal energy in each case. For the "bomb" calorimeter, no gaseous P-V work can be done because there can be no change in volume in the sealed steel "bomb"; therefore, the heat absorbed or released is exactly the change in internal energy of the "system"/reactants.
We then did several example of calorimetry, noting whether we had to use "heat capacity" of the calorimeter or specific heat (capacity)of water or of an aqueous solution in the calculation.
We briefly discussed the longer version of Hess's Law; we will learn both versions of his law tomorrow.
1.) the GROWTH and/or development of any multicellular/complex organism
and
2.) the REPAIR of damaged cells/tissues/organs of any complex organism.
We then discussed cancer, which is uncontrolled cell division, and how cancer cells harm an organism by using up most of its needed nutrients thus depriving normal cells of nutrients/sources of energy.
AP Chem- We discussed the two types of calorimeters and the relationship between heat and internal energy in each case. For the "bomb" calorimeter, no gaseous P-V work can be done because there can be no change in volume in the sealed steel "bomb"; therefore, the heat absorbed or released is exactly the change in internal energy of the "system"/reactants.
We then did several example of calorimetry, noting whether we had to use "heat capacity" of the calorimeter or specific heat (capacity)of water or of an aqueous solution in the calculation.
We briefly discussed the longer version of Hess's Law; we will learn both versions of his law tomorrow.
# posted by C @ 12:22 PM 
