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8: Energy Physics and Chemistry

Last updated

Sep 11, 2024
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- 7.14: End of Chapter Key Terms
- 8.1: Introduction and Learning Objectives

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8.1: Introduction and Learning Objectives
8.2: The Basics of Energy
- 8.2.1: Practice Problems- The Basics of Energy
8.3: Thermochemical Equations
8.4: Work and Energy
8.5: Chemistry in Physics
8.6: Kinetic Energy and the Work-Energy Theorem
The net work $W_{net}$ is the work done by the net force acting on an object. Work done on an object transfers energy to the object. The translational kinetic energy of an object of mass $m$ moving at speed $v$ is $KE = \frac{1}{2}mv^2$ . The work-energy theorem states that the net work $W_{net}$ on a system changes its kinetic energy, $W_{net} = \frac{1}{2}mv^2 - \frac{1}{2}mv_0^2$ .
8.7: Thermal Physics
8.8: Conservation of Energy
The law of conservation of energy states that the total energy is constant in any process. Energy may change in form or be transferred from one system to another, but the total remains the same. When all forms of energy are considered, conservation of energy is written in equation form as $KE_i + PE_i + W_{nc} + OE_i = KE_f + PE_f + OE_f ,$ where $OE$ is all other forms of energy besides mechanical energy.
8.9: End of Chapter Activity
8.10: End of Chapter Key Terms

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