Stars are hotter than planets, for example, which are warmer than icy asteroids, which are warmer still than the vacuum of the space between them. Example2: A gas on n mole in a volume V has temperature T and pressure P. Example1: 6 molecules are distributed 4 on the left, 2 on the right. Some Definitions The configuration of a system is some measurable state in which the system resides. Although it may have seemed disorderly, and therefore, superficially entropic, in fact, there was enormous potential energy available to do work-all the future energy in the universe.Īs the universe matured, temperature differences arose, which created more opportunity for work. For a reversible process the change in entropy is zero. Gravity played a vital role in the young universe. The slight fluctuation of some experimental data points in the stable. In the early, energetic universe, all matter and energy were easily interchangeable and identical in nature. As shown in Figure 2, the entropy increase rate can be well described by Equation (9). For the Einstein solid (with our macroscopic, high temperature approximation) theentropy is eq N q klnN k(ln+ 1): NN WithN 1022andq 1024we haveS 0:77JK. Qualitatively, entropy is simply a measure how much the energy of atoms and molecules become more spread out in a process and can be defined in terms of statistical probabilities of a system or in terms of the other. This is theentropy kln : The SI units of entropy are J/K. Heat Death of the Universe: An Overdose of Entropy Entropy is a state function that is often erroneously referred to as the state of disorder of a system.
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