Tuesday, December 23, 2008
Tues-Day 1
AP Chem- we reviewed (again) Coulomb's Law as it applies to ionic bonding.
We discussed the difference between a polar BOND and a polar MOLECULE, using CO2 as an example, due to its molecular geometry, of a molecule that has polar BONDS yet is a nonpolar molecule.
We then discussed various ways of collecting DATA that indicated the strength of ionic bonding in an ionic compound i.e. melting point, solubility in water, etc.
We saw that the Born-Haber multi-step process is a way that we can apply Hess's Law to also get a measure of the strength of ionic bonding in a salt or hydroxide base called "lattice energy".
Lattice energy is the energy RELEASED when a MOLE of a SOLID ionic compound forms from its IONS in the GAS phase.
Bio 6-8 - we finished our review of the digestive system by discussing the structure and function of the colon/large intestine. We then finished up the previous lab writeups, which were handed in and graded over the break. Upon our return, we will begin the second half of the unit: the endocrine system.
We discussed the difference between a polar BOND and a polar MOLECULE, using CO2 as an example, due to its molecular geometry, of a molecule that has polar BONDS yet is a nonpolar molecule.
We then discussed various ways of collecting DATA that indicated the strength of ionic bonding in an ionic compound i.e. melting point, solubility in water, etc.
We saw that the Born-Haber multi-step process is a way that we can apply Hess's Law to also get a measure of the strength of ionic bonding in a salt or hydroxide base called "lattice energy".
Lattice energy is the energy RELEASED when a MOLE of a SOLID ionic compound forms from its IONS in the GAS phase.
Bio 6-8 - we finished our review of the digestive system by discussing the structure and function of the colon/large intestine. We then finished up the previous lab writeups, which were handed in and graded over the break. Upon our return, we will begin the second half of the unit: the endocrine system.
# posted by C @ 10:58 AM 
