BIOL 2040 Chapter Notes -Thermodynamics, Bond Energy, Activation Energy
13 Apr 2013
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Study of energetics of chemical rxns; there are 2 relevant forms: heat energy movement of molecules, potential energy energy stored in chemical bonds. 1st law of thermodynamics (law of conservation of energy: energy of the universe is constant implies that when energy of system , energy of the universe (surroundings) must . 2nd law of thermodynamics: disorder (entropy [s]) of the universe tends to , spontaneous rxns the disorder of the universe this is discussed mathematically by (gibbs) free energy. G = h - t s (t temp, h enthalpy) H = e - p v (e bond energy, p pressure, v vol) Change in gfe determines if rxn is favourable (spontaneous, g) or unfavourable (nonspontaneous, Spontaneous rxns (favourable: occur w/o a net addition of energy or w/ energy to spare, g < 0, rxns with g are exergonic (energy exits the system)
