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asdf1
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Why is the definition different in physics and chemistry for the 2nd law of thermodynamics?
Entropy is defined the same way. dS=dQ/T. But it is used in different ways.asdf1 said:Why is the definition different in physics and chemistry for the 2nd law of thermodynamics?
They are not the same but they both express the second law. (Wm. Thomson was Lord Kelvin).asdf1 said:is the kelvin-planck statement the same as the thomsen statement?
The way that I saw it described about 35 years ago was:asdf1 said:it'd be nice if there were just one simple definition of entropy...
The 2nd law of thermodynamics states that the total entropy of a closed system will always increase over time. This means that energy will always naturally flow from a state of higher concentration to a state of lower concentration, resulting in a gradual decrease in usable energy in the system.
Entropy is a measure of the disorder or randomness in a system. The 2nd law of thermodynamics states that entropy will always increase in a closed system, meaning that energy will become less concentrated and more dispersed over time.
The 2nd law of thermodynamics explains why heat always flows from hot to cold objects. This is because, according to the law, heat or energy will always naturally flow from a state of higher concentration (the hotter object) to a state of lower concentration (the colder object).
One example of the 2nd law of thermodynamics is the efficiency of engines. As energy is converted from one form to another, such as from heat to mechanical work in an engine, some energy will always be lost in the form of heat due to the increase in entropy.
Another example is the process of aging. As living organisms age, their bodies become less efficient at converting energy into useful work, resulting in a gradual increase in entropy.
Yes, the 2nd law of thermodynamics is considered a fundamental law of nature and has been extensively tested and proven to hold true in all known systems. However, there are some exceptions, such as in certain microscopic systems or in systems with extremely low temperatures, where the law may not apply in the same way.