Biology 1002B Chapter Notes - Chapter 4: Kinetic Energy, Thermodynamics, Potential Energy
4 Apr 2016
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Energy can exist in different forms: chemical, electrical and mechanical: different types of light. Kinetic energy: energy possessed by an object because it is in motion: e. g. photons of light. Potential energy: stored energy, energy an object has because of its position or chemical structure. Discrete energy states: electron moving to higher energy levels or reverting back. Energy of system + surroundings will remain constant. 4. 1b the laws of thermodynamics describe energy and its transformation: Changes during physical and chemical transformations: thermodynamics. 3 types of systems: isolated system: no matter or energy exchanged, closed system: energy exchanged by but matter, open system: both energy and matter are exchanged and move freely. 4. 1c the first law of thermodynamics: energy can be transformed but not created or destroyed: Energy can be transformed from one form into another or transferred from one place to another, but it cannot be created or destroyed.
