BIOL 1F90 Lecture Notes - Lecture 16: Equilibrium Constant, Activation Energy, Atp Hydrolysis
11 Nov 2017
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Total energy = usable energy + unusable energy: usable energy can be used to do work, while unusable energy cannot, total energy of a system = enthalpy (h) Energy transformations involve an increase in entropy (s: entropy is a measure of the disorder that cannot be harnessed to do work ( = Free energy (g) is the amount of available energy that can be used to do work (= usable energy) H = g + ts: h = enthalpy or total energy, g = free energy or useable energy, t = absolute temperature in kelvin (k, s = entropy or unusable energy. We are usually interested in free energy, therefore: g = h ts. Occur without an additional input of energy. Rearrangement of atoms/bonds yields a product that is more stable than its precursor. The change in free energy (cid:523) g(cid:524)that occurs as a result of a chemical reaction can be used to determine if a reaction is spontaneous.
