October 31, 2003 - Chemical reactions

October 31, 2003 - Chemical reactions - Chemical reactions...

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Chemical reactions I. Kinetic energy a. Molecules in an aqueous solution move around relative to their energy and occasionally bang into each other causes an chemical reaction b. Reactions can be spontaneous c. Free Energy i. The energy available to perform work in a system when the temperature and pressure are constant throughout that system ii. Delta G = Delta H – T Delta S iii. Entropy 1. loss of energy to the system, more energy lost, less work d. Exergonic Reaction i. Energy releasing or exothermic ii. Results in a net release of free energy iii. Energy of Activation 1. Reactants can be at one free energy level and not change 2. If the energy level is raised, the bonds are allowed to break iv. Free energy starts out at one level, the activation level rises, and the final is a negative value, hence lower than the beginning e. Endergonic Reaction i. Energy storing or endothermic ii. Results in a storage of free energy in some end product molecule iii. Non spontaneous!! iv.
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This note was uploaded on 10/12/2011 for the course BIOLOGY 100 taught by Professor Smith during the Spring '11 term at South Carolina Upstate.

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October 31, 2003 - Chemical reactions - Chemical reactions...

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