Monday, October 15, 2007
Mon-Day 2
Bio- for HW, outline text section 7.2; I will collect the outline on Wednesday.
we reviewed the organelles and their functions; we then compared and contrasted plant and animal cells by noting the organelles common to both cells and the organelles that are unique to each type of cell.
We then began a discussion of the main/crucial processes to understand about materials that are transported into or out of cells:
passive transport (diffusion) and Active TransPort (requires energy/use of ATP).
I showed a video of a substance naturally/spontaneously diffusing (moving from a region in which it is highly concentrated to a region in which its concentration is lower). I'll post the video on Blackboard in the Course Documents section.
Tomorrow, we will do a demo and a lab involving diffusion of water (called OSMOSIS, which is LITERALLY the diffusion of water).
Chem 7/8- we looked at some telltale signs of a chemical change/reaction:
gas formation, precipitation/insoluble solid formation, color change, and fire/light emission accompanied by heat release or, oppositely, energy absorption. The last two signs are not definitive indications of a chemical change because they can also be signs of a mere physical change.
We labeled all of the relevant and important arrows in an enthalpy diagram with and without a catalyst. We also did some quantitative calculations with the PE values from the diagram of the given reaction.
I will show you how to use Table I, tomorrow.
We then did a lab in which we will measure the "heat of solution" which is the energy change per specific amount of substance dissolved. This is a PHYSICAL process because the sodium hydroxide merely dissolves in but does not react with the water.
I will discuss the calculations with you all on Wednesday.
Test corrections are due on Wednesday.
Chem 9- we looked at some telltale signs of a chemical change/reaction:
gas formation, precipitation/insoluble solid formation, color change, and fire/light emission accompanied by heat release or, oppositely, energy absorption. The last two signs are not definitive indications of a chemical change because they can also be signs of a mere physical change.
We labeled some of the relevant and important arrows in an enthalpy diagram. We will complete both the exothermic and endothermic PE/enthalpy curves.
I will also show you how to use Table I, tomorrow.
We then did a lab in which we will measure the "heat of solution" which is the energy change per specific amount of substance dissolved. This is a PHYSICAL process because the sodium hydroxide merely dissolves in but does not react with the water.
I will discuss the calculations with you all on Wednesday.
Test corrections are due on Wednesday.
we reviewed the organelles and their functions; we then compared and contrasted plant and animal cells by noting the organelles common to both cells and the organelles that are unique to each type of cell.
We then began a discussion of the main/crucial processes to understand about materials that are transported into or out of cells:
passive transport (diffusion) and Active TransPort (requires energy/use of ATP).
I showed a video of a substance naturally/spontaneously diffusing (moving from a region in which it is highly concentrated to a region in which its concentration is lower). I'll post the video on Blackboard in the Course Documents section.
Tomorrow, we will do a demo and a lab involving diffusion of water (called OSMOSIS, which is LITERALLY the diffusion of water).
Chem 7/8- we looked at some telltale signs of a chemical change/reaction:
gas formation, precipitation/insoluble solid formation, color change, and fire/light emission accompanied by heat release or, oppositely, energy absorption. The last two signs are not definitive indications of a chemical change because they can also be signs of a mere physical change.
We labeled all of the relevant and important arrows in an enthalpy diagram with and without a catalyst. We also did some quantitative calculations with the PE values from the diagram of the given reaction.
I will show you how to use Table I, tomorrow.
We then did a lab in which we will measure the "heat of solution" which is the energy change per specific amount of substance dissolved. This is a PHYSICAL process because the sodium hydroxide merely dissolves in but does not react with the water.
I will discuss the calculations with you all on Wednesday.
Test corrections are due on Wednesday.
Chem 9- we looked at some telltale signs of a chemical change/reaction:
gas formation, precipitation/insoluble solid formation, color change, and fire/light emission accompanied by heat release or, oppositely, energy absorption. The last two signs are not definitive indications of a chemical change because they can also be signs of a mere physical change.
We labeled some of the relevant and important arrows in an enthalpy diagram. We will complete both the exothermic and endothermic PE/enthalpy curves.
I will also show you how to use Table I, tomorrow.
We then did a lab in which we will measure the "heat of solution" which is the energy change per specific amount of substance dissolved. This is a PHYSICAL process because the sodium hydroxide merely dissolves in but does not react with the water.
I will discuss the calculations with you all on Wednesday.
Test corrections are due on Wednesday.
# posted by C @ 11:23 AM 
