Thursday, November 20, 2008
Thurs-Day 2
AP Chem: Unit 6 HW due Monday after Thanksgiving:
Read Chapter 6 and do questions 18, 22, 24, 27, 32, 34, 44, 48, 56, 58, 62, and 66.
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.
Bio 6- we discussed the specific LOCATION of photosynthesis in plant cells. We saw that there are two major regions within the chloroplast: the stacks of thylakoids are called "grana", which contain the light-absorbing chlorophylls. The chlorophyll pigments absorb light energy and this energy is used in two ways: 1. some of this energy is converted to ATP, which is used to perform PHOTOLYSIS, the splitting of water into oxygen molecules and hydrogen. The oxygen diffuses from the leaf but the hydrogen is transported from the grana to be used in making glucose. 2. the rest of the light energy is used to make ATP to drive/force/cause the "light-independent" reactions that synthesize glucose from carbon dioxide and the hydrogen (from the "split" water molecules). The other cytoplasm-filled region of the chloroplast is the "stroma" where the glucose is synthesized by using the ATP that is transported from the grana as the source of energy to force the synthesis reactions.
We saw that the chlorophylls absorb violet, blue, and red light most strongly but that they do not absorb green light well. The advantage of having both chlorophylls a AND b is that, because they absorb different colors of light most strongly, more light energy can be absorbed so that more energy for photosynthesis can be supplied.
We also discussed chromatography that is used to separate and detect the various light-absorbing pigment molecules that are in a given species of plant.
Bio 7/8- we discussed the specific LOCATION of photosynthesis in plant cells. We saw that there are two major regions within the chloroplast: the stacks of thylakoids are called "grana", which contain the light-absorbing chlorophylls. The chlorophyll pigments absorb light energy and this energy is used in two ways: 1. some of this energy is converted to ATP, which is used to perform PHOTOLYSIS, the splitting of water into oxygen molecules and hydrogen. The oxygen diffuses from the leaf but the hydrogen is transported from the grana to be used in making glucose. 2. the rest of the light energy is used to make ATP to drive/force/cause the "light-independent" reactions that synthesize glucose from carbon dioxide and the hydrogen (from the "split" water molecules). The other cytoplasm-filled region of the chloroplast is the "stroma" where the glucose is synthesized by using the ATP that is transported from the grana as the source of energy to force the synthesis reactions.
We saw that the chlorophylls absorb violet, blue, and red light most strongly but that they do not absorb green light well. The advantage of having both chlorophylls a AND b is that, because they absorb different colors of light most strongly, more light energy can be absorbed so that more energy for photosynthesis can be supplied.
We also discussed chromatography that is used to separate and detect the various light-absorbing pigment molecules that are in a given species of plant.
We then did test review, going over DRAWING or GIVING SPECIFIC EXAMPLES (as we ALWAYS do in class/in the notes) in order to make your answers ACCURATE and EASIER to write.
Read Chapter 6 and do questions 18, 22, 24, 27, 32, 34, 44, 48, 56, 58, 62, and 66.
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.
Bio 6- we discussed the specific LOCATION of photosynthesis in plant cells. We saw that there are two major regions within the chloroplast: the stacks of thylakoids are called "grana", which contain the light-absorbing chlorophylls. The chlorophyll pigments absorb light energy and this energy is used in two ways: 1. some of this energy is converted to ATP, which is used to perform PHOTOLYSIS, the splitting of water into oxygen molecules and hydrogen. The oxygen diffuses from the leaf but the hydrogen is transported from the grana to be used in making glucose. 2. the rest of the light energy is used to make ATP to drive/force/cause the "light-independent" reactions that synthesize glucose from carbon dioxide and the hydrogen (from the "split" water molecules). The other cytoplasm-filled region of the chloroplast is the "stroma" where the glucose is synthesized by using the ATP that is transported from the grana as the source of energy to force the synthesis reactions.
We saw that the chlorophylls absorb violet, blue, and red light most strongly but that they do not absorb green light well. The advantage of having both chlorophylls a AND b is that, because they absorb different colors of light most strongly, more light energy can be absorbed so that more energy for photosynthesis can be supplied.
We also discussed chromatography that is used to separate and detect the various light-absorbing pigment molecules that are in a given species of plant.
Bio 7/8- we discussed the specific LOCATION of photosynthesis in plant cells. We saw that there are two major regions within the chloroplast: the stacks of thylakoids are called "grana", which contain the light-absorbing chlorophylls. The chlorophyll pigments absorb light energy and this energy is used in two ways: 1. some of this energy is converted to ATP, which is used to perform PHOTOLYSIS, the splitting of water into oxygen molecules and hydrogen. The oxygen diffuses from the leaf but the hydrogen is transported from the grana to be used in making glucose. 2. the rest of the light energy is used to make ATP to drive/force/cause the "light-independent" reactions that synthesize glucose from carbon dioxide and the hydrogen (from the "split" water molecules). The other cytoplasm-filled region of the chloroplast is the "stroma" where the glucose is synthesized by using the ATP that is transported from the grana as the source of energy to force the synthesis reactions.
We saw that the chlorophylls absorb violet, blue, and red light most strongly but that they do not absorb green light well. The advantage of having both chlorophylls a AND b is that, because they absorb different colors of light most strongly, more light energy can be absorbed so that more energy for photosynthesis can be supplied.
We also discussed chromatography that is used to separate and detect the various light-absorbing pigment molecules that are in a given species of plant.
We then did test review, going over DRAWING or GIVING SPECIFIC EXAMPLES (as we ALWAYS do in class/in the notes) in order to make your answers ACCURATE and EASIER to write.
# posted by C @ 6:17 AM 
