Is a number that's too high for us to even comprehend. So the number of microstatesĪvailable to this system of one mole of gas particles Moving from one microstate into another, into another, into another. The microscopic level, we see that the system is So from a macroscopic point of view, nothing seems to change. A good way to think aboutĪ microstate would be like taking a picture of Microscopic arrangement of positions and energies So going back to our boxes,īox 1, box 2 and box 3, each box shows a different To the kinetic energies of the particles. With an ideal gas here, by energies, we're referring Microscopic arrangement of all of the positions andĮnergies of the gas particles. Of each particle is equal to 1/2 mv squared, where m is the mass of each Particles are meant to represent the velocities of the particles. And the magnitude and theĭirection give a velocity. However, when we put anĪrrow on each particle, that also gives us the direction. Of a particle tells us how fast the particle is traveling. Slightly different positions and the velocities might have changed. Particles in our system at one moment in time, in box 1, if we think about them atĪ different moment in time, in box 2, the particles might be in Slamming into each other and transferring energy from Slamming into the sides of the container and maybe Here in the first box, imagine these gas particles However, from a microscopic point of view, things are changing all of the time. So from a macroscopic point of view, nothing seems to be changing. Particles is at equilibrium, then the pressure, the volume, the number of moles, and the temperature all remain the same. Moles at a specific pressure, volume, and temperature. And to think about microstates, let's consider one mole of an ideal gas. There might be decreases in freedom in the rest of the universe, but the sum of the increase and decrease must result in a net increase.Of entropy is related to the idea of microstates. The freedom in that part of the universe may increase with no change in the freedom of the rest of the universe. Statistical Entropy - Mass, Energy, and Freedom The energy or the mass of a part of the universe may increase or decrease, but only if there is a corresponding decrease or increase somewhere else in the universe.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 thermodynamic quantities. Statistical Entropy Entropy is a state function that is often erroneously referred to as the 'state of disorder' of a system. Phase Change, gas expansions, dilution, colligative properties and osmosis. Simple Entropy Changes - Examples Several Examples are given to demonstrate how the statistical definition of entropy and the 2nd law can be applied.A microstate is one of the huge number of different accessible arrangements of the molecules' motional energy* for a particular macrostate. Instead, they are two very different ways of looking at a system.
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