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• DEFINITION OF ENTROPY FREE

If you have any queries, feel free to comment below in the comments section.Īlso let me know, which is the best example you enjoyed the most. I hope you have clearly understood the concept and definition of entropy in thermodynamics. Thus we can say that the entropy of such substances at absolute zero temperature is zero.įor more information about third law of thermodynamics, you can check out this article – Everything about 3rd law of thermodynamics. This indicates that there is no disorder or randomness in the system. The kinetic energy of the molecules will become zero. If we keep on reducing the temperature and if we reach the temperature of 0 K (or -273.15 ☌), then all the molecular motion will stop. If we decrease the temperature of the system, the kinetic energy of the gas molecules also decreases.Īgain if we keep on decreasing the temperature of the system, then there will be more decrease in kinetic energy of the molecules. You can see that the gas is filled inside the container. The formula for change in entropy is given by the equation But we can only measure the change in the entropy (∆S) of the system. 2 Joint Entropy Joint entropy is the entropy of a joint probability distribution, or a multi-valued random variable. The fact: We can not measure the exact entropy of any system. The entropy is denoted by the alphabet “S”. The entropy of liquids lies in between the solids and liquids.It has more randomness which means it has more entropy. In gases, the molecules move very fast throughout the container.

In solids, the molecules are properly arranged, which means it has less randomness, so the entropy of solids is least.It’s simple, it is just a measurement of how much randomly the molecules are moving in a system. “Entropy is the measurement of disorder of the system.” “The measurement of randomness of the system is known as Entropy.” Now, let me give you a simple definition of entropy. Now, entropy is nothing but a measurement of this randomness in any system. Few seconds ago, we discussed about the randomness.