BIOL 1201 Chapter : February 16; Chpt 8
Document Summary
Figure 8. 12 - energy profile of an exergonic reaction. Only proceed spontaneously in the "downhill" reaction. G: energy is released during the reaction. Q - your roommate side of the room keeps getting messier - second law of thermodynamics. Q - your side stays neat because of the energy you supply - open system. Q - an exergonic reaction - - g. G = h (heat) - t (temp) s. Exergonic (in this case, burning coal is exothermic) The height of the activation energy barrier determines the rate of the reaction. Energy required for the favorable positioning of the reactants so the reaction can occur. Transition state - the hill which represents the activation energy. The amount of energy that has to occur in order for the reactants to be spontaneous. Reaction rates are increased because enzymes lower the activation energy barrier (the g value) Figure 8. 13 - enzymes lower the barrier of activation energy.
