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By Witmer E. E.

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Energy-dependent “energetic” Energetically controlled Thermodynamic Time-dependent “Temporal” Temporally controlled Mechanical A thermodynamic process whose pathway and speed is determined by an intangible, underlying energy landscape or energy field. , a ball rolling into a well, water flowing downhill, or a compass needle). In chemistry, this process refers to reactions (catalyzed and uncatalyzed) whose rates and pathways are determined by the energy change (and energy landscape) involved in the reaction and, especially, about the activated complex (the reaction transition state).

To illustrate just how unpredictable such a system could be, consider that all of the above possible events will be exquisitely sensitive to the precise arrangement of the dominoes in the respective lines. For example, if two dominoes in one of the lines were placed slightly further apart than the rest, this would cause them to take slightly longer to knock over their next domino. The collapse sequence of that line would thereby by slowed, albeit imperceptibly. 5. Chaos theory: a chaotic time-dependent system: Which of dominoes A, B, or C, will fall first?

Where we use the term mechanical, it should be understood that this is used to signify a process or event that is brought about by a physical action– reaction sequence. 2 WHAT IS A THERMODYNAMIC PROCESS? Thermodynamics involves the study of changes in temperature, volume, and pressure, as well as the transfer of energy, on physical systems [1–3]. Of central importance to this study are the laws of thermodynamics, which theorize that energy can be exchanged between a system and its surroundings [1–3].

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