Lecture_F - xidation-Reduction Reactions Flows of Electrons...

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Unformatted text preview: xidation-Reduction Reactions Flows of Electrons and Work Electron-Transporting Coenzymes Redox reactions Learning Objectives Oxidation With and Without Oxygen Flow of Electrons do Work via Electrical Motor Electric motors convert electron flow into mechanical motion. A battery has two electrodes with different affinity to electrons. Electrons move from the low-affinity electrode to the high-affinity electrode via macroscopic circuit. A chemical energy inside the battery moves electrons from the high-affinity to the low-affinity electrode. Flow of Electrons do Work via uscle In a biological circuit, the source of electrons are reduced compounds in the food. They have atoms with low affinity to electrons. As the reduced compounds are enzymatically oxidized, electrons are released. Electrons flow to the substance with high affinity to electrons (O 2 ). The resultant electromotive force is transduced to biological work. Fife Oxidation States of Carbon Most reduced O = C = O Most oxidized CH 3 CH 3 Ethane CH 3 H 2 C-OH Ethanol CH 3 CH O Aldehyde CH 3 C-OH O Acetic acid Carbon dioxide In ethane, charges at...
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Lecture_F - xidation-Reduction Reactions Flows of Electrons...

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