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Unformatted text preview: Lecture 11 Flow of Energy A. Introduction- Living organisms To be alive, we need energy Being an organized, moving organism requires energy We cant make our own energy- Transformation We can only transform e n ergy B. Energy transformation 1. Energy- The ability to do work 2. Types- Living organisms convert types of e n ergy from one form to another 1) Radiant e n ergy, a.k.a.- Electrom agn etic en ergy- Comes from the sun 2) Electric e n ergy 3) Che mical en ergy- Bonds- Glucose (C 6 H 12 O 6 ) 4) Sound energy 5) Mechanical energy 6) Heat energy- Som e che mists say he at is a process, not e n ergy 3. Thermodyna mics- The study of e n ergy transformation- Thermo = he at- Dyna mics moving 4. 1 st Law of Thermodynamics- Conservation of en ergy The total en ergy in the universe is constant You can chang e en ergy from one form to another, but en ergy cannot b e creat ed or destroyed- H = G + TS H = e nthalpy- The total a mount of e n ergy- Doesnt chang e G = free en ergy- Useful en ergy- We can do work with free en ergy b ecause it is unstable- Has a gradient T = te m p erature S = e ntropy...
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- Fall '07