The actual entropy of the bricks has to do with their internal temperature. (The arrangement of the bricks is not a literal representation of the brick's entropy, rather it is just to demonstrate the idea of "multiplicity". This concept of decreasing a non-isolated system's entropy can be visualized in Figure 3 below. This is analogous to refrigeration, as work must be input to the refrigerator in order to cool it down, therefore decreasing its entropy. This increase in the air must be more than the decrease in the water, because the whole system's entropy must increase. ![]() This happens because heat energy is transferred from the water to the surrounding air, therefore increasing the entropy of the air. The water forms a highly organized crystal, and the entropy of the water decreases as it forms this structure. However, because the open system's entropy is decreasing, there must be an increase of entropy outside of the system.įor example, this is why water can freeze into complex structures. In order for this decrease in entropy to be possible, they must take in energy from an outside source. ![]() Systems that become more ordered as time passes are called self-organizing systems. Open systems are free to interact with their environment, and therefore energy can be added to or removed from them. This is a major confusion in understanding entropy, and it is important to distinguish between an isolated (closed) and non-isolated (open) system. The answer is that this disorder only applies to systems that do not exchange energy with their environment, known as isolated systems. Since entropy is increasing, and the Second law entails that out of this increase comes disorder, randomness and simplicity, how is it that there is so much order and complexity around us?
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