Tuesday, November 25, 2008
Tues-Day 1
AP Chem- Note: I posted yet another Thermochem practice test (on Blackboard); this one has a detailed answer key ( a couple of the heat of formation values are not in your text so you will have to google them or check the answer key). I'll also post some organic chem naming tutorials because you must know/recognize all of the functional groups/types of organic molecules that you were given on the Regents cheat-chart last year; there are NO organic formulas/keys on the AP reference table so you must know each group by rote.
We corrected a few Hess Law problems by focusing on
1. ESTIMATING the correct answer (very important and most practical skill for this unit).
2. cancelling the units and understanding the overall reaction energy value is per mol of REACTION
We then did a Hess Law multi-step problem. We also discussed the meaning (and CAUSE) of the relative delta H of FORMATION values of aqueous ions. The reference value is delta Hf for H+ (aq), which is 0 kJ per mole.
We continued with another Hess Law problem: an anionic single replacement redox reaction in which we applied the enthalpies of formation of aqueous ions to calculate the overall heat/enthalpy of reaction.
Bio 6/7- we finished our discussion of the structure and function of the leaf, including the various layers and cell types. We focused on the guard cells that FORM the stoma/mouths/pores/stomates on the bottom side of the leaf. These stomates allow an easy entrance for CO2 gas from the air but they allow water vapor to escape.
We then discussed the transport of water in the xylem via capillary action, which is due to adhesion of water to the xylem walls and cohesion of water molecules to each other.
We then introduced the definition and equation for cellular respiration.We finished up our rate of photosynthesis lab, though there may have been some dead/dying Elodea that made observations difficult. We will clear that up next time.
Bio 8- we finished our discussion of the structure and function of the leaf, including the various layers and cell types. We focused on the guard cells that FORM the stoma/mouths/pores/stomates on the bottom side of the leaf. These stomates allow an easy entrance for CO2 gas from the air but they allow water vapor to escape.
We then discussed the transport of water in the xylem via capillary action, which is due to adhesion of water to the xylem walls and cohesion of water molecules to each other.
We then introduced the definition and equation for cellular respiration.
We corrected a few Hess Law problems by focusing on
1. ESTIMATING the correct answer (very important and most practical skill for this unit).
2. cancelling the units and understanding the overall reaction energy value is per mol of REACTION
We then did a Hess Law multi-step problem. We also discussed the meaning (and CAUSE) of the relative delta H of FORMATION values of aqueous ions. The reference value is delta Hf for H+ (aq), which is 0 kJ per mole.
We continued with another Hess Law problem: an anionic single replacement redox reaction in which we applied the enthalpies of formation of aqueous ions to calculate the overall heat/enthalpy of reaction.
Bio 6/7- we finished our discussion of the structure and function of the leaf, including the various layers and cell types. We focused on the guard cells that FORM the stoma/mouths/pores/stomates on the bottom side of the leaf. These stomates allow an easy entrance for CO2 gas from the air but they allow water vapor to escape.
We then discussed the transport of water in the xylem via capillary action, which is due to adhesion of water to the xylem walls and cohesion of water molecules to each other.
We then introduced the definition and equation for cellular respiration.We finished up our rate of photosynthesis lab, though there may have been some dead/dying Elodea that made observations difficult. We will clear that up next time.
Bio 8- we finished our discussion of the structure and function of the leaf, including the various layers and cell types. We focused on the guard cells that FORM the stoma/mouths/pores/stomates on the bottom side of the leaf. These stomates allow an easy entrance for CO2 gas from the air but they allow water vapor to escape.
We then discussed the transport of water in the xylem via capillary action, which is due to adhesion of water to the xylem walls and cohesion of water molecules to each other.
We then introduced the definition and equation for cellular respiration.
# posted by C @ 1:01 PM 
