Monday, March 26, 2007
Mon-Day 7
Regents: we discussed the five factors that can influence the rate of a reaction (temp, concentration, pressure (for gases), surface area (for solids and liquids), and addition of a catalyst; we also explained the relationship between the nature of the reactants (covalent molecules vs. dissolved ions) and the rate of reaction.
Tomorrow is Day 1; we have a gas laws lab. Please bring in a 12-ounce aluminum can (preferably empty), tomorrow.
Thanks.
Honors: we showed how a balanced chemical equation can be used to determine the RELATIVE rates of disappearance of the reactants and the relative rates of appearance of the products.
We then discussed reaction mechanisms and then we went on to potential energy diagrams for exothermic and endothermic reactions, noting the important points: PE Reactants, Activation Energy, PE Products, delta H.
AP: we discussed entropy and predicted the change in entropy for a given reaction or process. We related the third law of thermo to the ABSOLUTE standard molar entropies of various substances, which we then qualitatively predicted. We then applied Hess's Law to calculate the CHANGE in entropy for a given reaction.
Tomorrow is Day 1; we have a gas laws lab. Please bring in a 12-ounce aluminum can (preferably empty), tomorrow.
Thanks.
Honors: we showed how a balanced chemical equation can be used to determine the RELATIVE rates of disappearance of the reactants and the relative rates of appearance of the products.
We then discussed reaction mechanisms and then we went on to potential energy diagrams for exothermic and endothermic reactions, noting the important points: PE Reactants, Activation Energy, PE Products, delta H.
AP: we discussed entropy and predicted the change in entropy for a given reaction or process. We related the third law of thermo to the ABSOLUTE standard molar entropies of various substances, which we then qualitatively predicted. We then applied Hess's Law to calculate the CHANGE in entropy for a given reaction.
# posted by C @ 5:56 PM 
