Wednesday, January 6, 2010
Wednes-Day 2
Bio 3/6- we reviewed a worksheet to reinforce the knowledge of the specific functions of each part of the digestive system with respect to the enzymes produced and the specific nutrients digested.
AP Chem - We focused on Raoult's Law and did several problems in which we used vapor pressure and mole fraction of substances IN SOLUTION to make calculations with respect to vapor pressure lowering and also with respect to molar mass of the solute.
We also showed that, once the partial pressures of all vapor components are calculated via Raoult's Law, we could THEN use Dalton's Law to calculate the mole fraction of each component in the GAS/VAPOR phase.
We also confirmed, based on predictions of intermolecular forces and the actual vapor pressure data, which of the components of a mixture should INCREASE in its mole fraction in the VAPOR/GAS phase relative to its mole fraction in the LIQUID phase (i.e. the component(s) with WEAKER IMFA's will INCREASE in their mole fraction in the vapor phase because a GREATER fraction of its molecules will have sufficient energy to overcome these WEAKER IMFA's and "escape" into the vapor/gas phase.
AP Chem - We focused on Raoult's Law and did several problems in which we used vapor pressure and mole fraction of substances IN SOLUTION to make calculations with respect to vapor pressure lowering and also with respect to molar mass of the solute.
We also showed that, once the partial pressures of all vapor components are calculated via Raoult's Law, we could THEN use Dalton's Law to calculate the mole fraction of each component in the GAS/VAPOR phase.
We also confirmed, based on predictions of intermolecular forces and the actual vapor pressure data, which of the components of a mixture should INCREASE in its mole fraction in the VAPOR/GAS phase relative to its mole fraction in the LIQUID phase (i.e. the component(s) with WEAKER IMFA's will INCREASE in their mole fraction in the vapor phase because a GREATER fraction of its molecules will have sufficient energy to overcome these WEAKER IMFA's and "escape" into the vapor/gas phase.
# posted by C @ 10:42 PM 
