Monday, April 26, 2010
Mon-Day 2
Bio - we reviewed the lines of evidence for evolution via a series of powerpoints (posted on Blackboard);
we noted the significance of HOMOLOGOUS structures (same assembly of bones but different lengths, densities, and functions) among species- the greater the number of homologous structures between two given species, the more closely related the two species. Analogous structures have the same function but do NOT show a close common ancestor relationship because the actual anatomy is very different between these two structures i.e. a butterfly wing and a bird wing.
We then discussed one of the major early Theories/Explanations of Change/Evolution of species as presented by Lamarck. He was shown to be wrong but at least his theory was logical and scientific, and could be negated/shot down by experimental evidence.
AP Chemistry - we finished up Thermodynamics by showing the major calculation error of assuming that the equilibrium temperature for a process at standard conditions could be calculated from the equation that has dGo and K. We MUST use the dGo = dHo -TdSo equation because ONLY dHo and dSo remain almost the same values over a large temperature range. Any problem that asked for the value of dG at 1 atm pressure i.e. standard conditions is asking for dGo, no matter what the temperature.
We then began our final unit: Electrochemistry.
# posted by C @ 2:40 PM 
