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internal energy |
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internal energy [in′tərn·əl ′en·ər·jē] (thermodynamics) A characteristic property of the state of a thermodynamic system, introduced in the first law of thermodynamics; it includes intrinsic energies of individual molecules, kinetic energies of internal motions, and contributions from interactions between molecules, but excludes the potential or kinetic energy of the system as a whole; it is sometimes erroneously referred to as heat energy. Internal energy A characteristic property of the state of a thermodynamic system, introduced in the first law of thermodynamics. For a static, closed system (no bulk motion, no transfer of matter across its boundaries), the change in internal energy for a process is equal to the heat absorbed by the system from its surroundings minus the work done by the system on its surroundings. Only a change in internal energy can be measured, not its value for any single state. For a given process, the change in internal energy is fixed by the initial and final states and is independent of the path by which the change in state is accomplished. See Thermodynamic principles How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| By leveraging our size and scale, we developed the industry's first comprehensive internal energy and engineering team focused on reducing energy usage and utility costs to make sure energy is utilized, distributed, generated and procured as cost effectively and efficiently as possible across our nationwide portfolio of buildings. In the short run, the municipality may have to take an economic shortfall to develop an internal energy source if it wants to build a value-added industry. Capstone is also attempting to draw a little internal energy. |
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