notes_Lecture_01_100110

notes_Lecture_01_100110 - Lecture 1 Energy Reading Zumdahl...

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Lecture 1: Energy • Reading: Zumdahl 9.1 • Outline: - General properties/trends of Kinetic and Potential Energy - Molecular kinetic energy and molecular potential energy; Internal energy - Conservation of energy; system vs. surroundings - Methods of transferring energy between system and surroundings: heat and work - Define PV±work - Examples
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Thermodynamics The study of energy and its interconversion . Energy is the capacity to do work or to produce heat Law of conservation of energy – Energy is neither created nor destroyed – It is only converted from one form to another Total amount remains unchanged Some examples of energy interconversion. .. sunlight : radiant (electromagnetic) energy. ..plants harvest sunlight and convert it to sugars (chemical energy) food : the sugars (chemical energy content) from plants are metabolized by animals (different chemical energy content), allowing them to move around and stay alive (kinetic energy) gas : long-dead plants and animals (chemical energy) are distilled and refined and delivered to your car where they are burned up and converted to kinetic energy and heat.
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Potential Energy (PE) – the energy an object has by virtue of its placement in a field of force, like gravity. PE = mgh in this example, where m = mass, g = acceleration due to gravity, and h = height h m Ball has potential energy due to the pull of gravity Energy: Kinetic vs. Potential
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Potential Energy (PE) – the energy an object has by virtue of its placement in a field of force, like gravity. PE = mgh in this example, where m = mass, g = acceleration due to gravity, and h = height Kinetic Energy (KE) – the energy an object has by virtue of its motion KE = ½ mv 2 , where m = mass and v = velocity h v Falling ball has kinetic energy Energy: Kinetic vs. Potential
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Energy = KE + PE • Total Energy is the sum of kinetic energy and potential energy. • Energy is readily converted
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This note was uploaded on 09/29/2011 for the course CHM 101 taught by Professor Ma during the Spring '11 term at Beacon FL.

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notes_Lecture_01_100110 - Lecture 1 Energy Reading Zumdahl...

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