CHEM 153A Final: THERMODYNAMICS REVIEW

• School: UCLA
• Department: Chemistry and Biochemistry
• Course: CHEM 153A
• Professor: Tienson

Document Summary

Determine where a physical process is possible (i. e spontaneous) Provide no info about the rate of a physical process (depend on activation energy) G = h (heat content) ts (entropy) Deltah = [energy required to break bonds] - [energy released to break bonds] Enthapically favorable = exothermic = -ve deltah = system releases energy. Deltas = [disorder of products] - [disorder of reactants] = system tends toward overall disorder. Biochemical standard state conventions: at equilibrium (25oc, 1 atm, ph = 7. 0) If h < t s: actual free energy change g (based on conditions in the cell) Usually at steady state, any temperature, ~ph = 7. 4. Free energy changes: (cid:0)go" = standard (cid:0)g = in the cell. [p]/[r] = in the cell (cid:0)g > 0. Reverse (towards reactants) / more products than expected at equi. Forward (towards products)/ less products than expected at equi. Equilibrium (i. e. death) if [p]/[r] <1 => more reactants.