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lakshmi
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what is entropy
Entropy is a scientific concept that refers to the measure of the disorder or randomness in a system. It is often used in the fields of physics, chemistry, and information theory to describe the amount of energy that is unavailable to do work.
Entropy is typically measured in units of joules per kelvin (J/K) in the SI system of measurement. It can also be measured in units of calories per degree Celsius (cal/°C) in the cgs system of measurement.
The Second Law of Thermodynamics states that the total entropy of a closed system always increases over time. This means that the disorder or randomness in a system will always increase, resulting in less energy being available to do work.
In information theory, entropy is used to measure the uncertainty or randomness in a data set. The higher the entropy, the more unpredictable the data is, and vice versa.
One example of entropy can be seen in a cup of hot coffee placed in a cold room. As the temperature of the coffee decreases, the molecules in the coffee become more disordered, resulting in a decrease in available energy. Another example is the melting of ice, where the solid, organized structure of ice is converted into a disordered liquid state with less available energy.