Entropy & Enthalpy Analogy: Understand Easily

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In summary, the conversation discusses the concept of entropy and enthalpy and how they can be analogized to help students understand them better. The analogy of a quasi-static process being compared to an old man with health problems walking slowly is mentioned as an example. The speaker also asks for an analogy for entropy and enthalpy and the other person mentions that enthalpy can be related to the burning of a hand when touching hot water. The speaker also asks for an explanation of enthalpy in terms of U and PV, and the other person mentions that enthalpy is the heat content of a substance while entropy is a theoretical concept related to disorder in a system. They also express interest in learning more about these concepts in the future.
  • #1
lecturer
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Iwant any analogy for entropy & enthalpy...
For example quasi static process can be related to "old man with health problem walks almost static"... so students can easily understand. ... can you please suggest any analogy for ENTROPY & ENTHALPY
 
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  • #2
lecturer said:
Iwant any analogy for entropy & enthalpy...
For example quasi static process can be related to "old man with health problem walks almost static"... so students can easily understand. ... can you please suggest any analogy for ENTROPY & ENTHALPY
It's not clear how you want to analogize these two properties. Enthalpy burns your hand if you stick it into a pan of hot water. Who knows what entropy does.
 
  • #3
Enthalpy h = u+pv, can you please explain burning of hand in terms of h = u, pv ... what are the changes in these terms
 
  • #4
lecturer said:
Enthalpy h = u+pv, can you please explain burning of hand in terms of h = u, pv ... what are the changes in these terms
All I know is enthalpy = heat content of a substance. Entropy is more theoretical and variously described as a measure of disorder in a system.
 
  • #5
Thank you for your reply brother.. if you know anything in future kindly let me know...
 
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FAQ: Entropy & Enthalpy Analogy: Understand Easily

What is the meaning of entropy and enthalpy?

Entropy and enthalpy are thermodynamic properties that describe the energy and disorder of a system. Entropy is a measure of the randomness or disorder of a system, while enthalpy is a measure of the total energy of a system.

How are entropy and enthalpy related?

Entropy and enthalpy are related through the laws of thermodynamics. The second law of thermodynamics states that the total entropy of a system and its surroundings will always increase in a spontaneous process. Enthalpy, on the other hand, is related to the first law of thermodynamics, which states that energy can neither be created nor destroyed. Together, these laws show the relationship between the disorder and energy of a system.

What is the analogy between entropy and enthalpy?

The analogy between entropy and enthalpy can be thought of as a messy room and a clean room. In a messy room, there is a lot of disorder (entropy) and it takes energy (enthalpy) to clean it up. Similarly, in a chemical reaction, disorder (entropy) is created, and energy (enthalpy) is either released or absorbed.

How can I understand entropy and enthalpy easily?

One way to understand entropy and enthalpy easily is to think of them as two sides of the same coin. Entropy represents the disorder or randomness of a system, while enthalpy represents the energy of a system. By understanding the relationship between these two properties and how they are affected by thermodynamic laws, one can gain a better understanding of their meaning.

Why are entropy and enthalpy important in science?

Entropy and enthalpy are important in science because they help us understand and predict the behavior of systems, especially in chemical and physical processes. These properties are crucial in fields such as thermodynamics, chemistry, and physics, and play a key role in understanding the world around us.

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