Science & The Law Of Entropy

The Law of Entropy and sciences measure disorder in the universe. Due to laws of thermodynamics it is always increasing, why? How does this odd sounding unit control our universe?

The second law of thermodynamics states that in any isolated system, the degree of disorder can only increase. Our universe is an isolated system, so the degree of disorder is always increasing. How is this possible?

Movement towards order requires energy. Take the example of a shirt, folding it takes more energy than throwing it on the ground. Another way of saying this, is that creation of a disorganized state is spontaneous, that is, it doesn't require energy. Entropy is the amount of disorder in an isolated system, or our universe.

Human mortality is related to the amount of entropy in our body. Once the entropy increases to a certain level, we are no longer able to complete our required functions. However, we don't constantly increase in entropy from the day we are born. Instead, we maintain a stasis of order, until old age.

How do we maintain, and even increase order, without going against the second law of thermodynamics? The human body is not an isolated system. The human body acts in conjunction with the rest of the biosphere. We ingest "energy" from food that we eat, which has previously taken it from the sun. So while we are increasing our level of order, that around us is decreasing.

It is important to take the first law of thermodynamics into account when attempting to envision the careful balance in our universe. The first law states that energy can't be created or destroyed. However, it can be converted from one form to another. Imagine all of the conversion that happen in our universe. The sunlight is converted into chemical energy through photosynthesis. Chemical energy is used in our bodies to produce movement and electrical energy, and the list goes on and on.

Thermal energy, or heat energy, is often the way that excess energy is expelled from organisms. It is this heat energy which causes the universe to become more disordered at our expense. Our very body temperature affects the level of entropy in the universe.

The basic theory of entropy is simply that everything is always proceeding toward a state of greater disorder. The first and second laws of thermodynamics help to set up the foundation or entropy. Remember, if something appears to be decreasing in entropy, it is affecting something else in its system, and causing it to increase its entropy.

If you look at the broad picture, entropy actually makes sense, it is simply saying that everything is interrelated. Intuitively it can be seen that if something gets "hotter" something became cooler. Although heat energy is by no means the only way of conveying energy, it is the most common and easiest to understand. Let us take the example of the ice cube. If you take an ice cube and put it into a warm room, the ice cube will melt. However, as it melts, the room becomes slightly cooler. The room has become more organized while the ice cube has become more disorganized, thus gained entropy.

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