F05L22_6 - Chapter 5 Thermochemistry 3. In terms of...

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1 Chapter 5 Thermochemistry I. The Nature of Energy A. thermodynamics – study of energy and its transformations 1. thermochemistry – relationships between chemical reactions and energy changes B. Kinetic Energy and Potential Energy 1. K.E. – the energy of motion 2. P.E. – stored energy 3. In terms of chemistry: a. chemical energy – potential energy is stored in the arrangements of atoms. b. thermal energy – kinetic energy associated with the motion of atoms. C. Units of Energy 1. Joule – 2. calorie – 3. Calorie – D. System and Surroundings 1. system – singled out for study 2. surroundings – everything else 3. closed system – only energy is exchanged with surroundings Note: Energy is exchanged between system and surrounding in the form of heat. E. Transferring Energy: Work and Heat 1. force – “push or pull” 2. work 3. heat – energy is transferred from hotter to colder object 4. energy – capacity to do work or transfer heat a. endothermic – system absorbs heat, +
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F05L22_6 - Chapter 5 Thermochemistry 3. In terms of...

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