CHEM 1A Study Guide - Midterm Guide: Le Chatelier'S Principle, Equilibrium Constant, Reaction Quotient
Document Summary
Plug and chug: hess" law g, h, bond enthalpies: spontaneity, general criterion for equilibrium is suniv=0. Forward or backward: uses physical changes, chemical reactions. T dependence on spontaneity: use free energy to determine rxn direction. G<0 forwards (high temp the graph!) G = h -t s [@ low t: g ~ h] entropic= positive change in entropy. Free energy minimum: dynamic, forward and reverse rates are the same, calculate by solving for g=0 suni= 0, rate (a b) = rate (b a) K=[b]^2/[a: equilibrium when constants stop changing, rules, for aqueous phase in rxn. Scales to number of things need to collide. Changing concentrations effects: for gaseous phase in rxn. Can just use partial pressures: for solids/liquids in rxn. Set to 1 & value gets subsumed into k constant: qualifying eq, use mol balance to solve for the ice box. Applying: a(aq) + 2b(s) 3c(l) + 4d(g) Away from standard conditions: this analysis works for standard conditions.
