Lecture 11 – Flow of Energy

Lecture 11 – Flow of Energy - Lecture 11...

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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 can’t 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- Doesn’t 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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Lecture 11 – Flow of Energy - Lecture 11...

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