BIS 2A Lecture Notes - Lecture 3: Electron Donor, Lactic Acid, Electron Acceptor
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Document Summary
Energy is not a substance, rather a property of a system. We consider it a property that can be stored and transferred. 1st law: energy is constant, it can be moved but can"t be created or destroyed. *in energy stories* don"t say energy is produced but it"s given off . Entropy is always increasing in a system and its surroundings. Entropy: how much energy can be dispersed within a system. Usually moving from lower entropy to higher (energy wants to move toward maximum dispersion) If moves from high entropy to low, then the surroundings are doing the opposite to fit this law. Energy, although conserved, is often dispersed into a less useful form. Amount of energy available and useful to do work. If free energy in system increases: endergonic (unfavourable) If free energy in a system decreases: exergonic (favourable) Initial positive change in free energy needed to start a reaction. @ maximum free energy = transition state.
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