Related Experiment Video
Updated: Dec 7, 2025

09:09
Asymmetric Thermoelectrochemical Cell for Harvesting Low-grade Heat under Isothermal Operation
Published on: February 5, 2020
7.5K
"Thermoeconomics": Time to move beyond the second law
1Institute for the Study of Complex Systems, 900 University Street, D-X, Seattle, WA, 98101, USA.
Progress in Biophysics and Molecular Biology
|September 25, 2020
Summary
Thermoeconomics redefines biological energy using economic principles like efficiency and profitability, offering a better evolutionary explanation than the Second Law of Thermodynamics.
Area of Science:
- Evolutionary Biology
- Bioenergetics
- Thermodynamics
Background:
- Traditional understanding of energy in evolution relies on the Second Law of Thermodynamics.
- This framework struggles to explain advances and recessions in bioenergetic mechanisms.
- A new perspective is needed to fully grasp energy's role in life and evolution.
Observation:
- Living systems and evolution can be better understood through an economic lens.
- Key economic criteria include productivity, efficiency, and the cost-benefit analysis of energy capture and utilization.
- This approach focuses on the 'profitability' of energy mechanisms for biomass production and work.
Findings:
- Thermoeconomics proposes energy in evolution is best defined by economic criteria, not solely the Second Law of Thermodynamics.
- This new paradigm, thermoeconomics, is fully consistent with contemporary evolutionary theory.
- Functional criteria derived from thermoeconomics offer superior explanations for bioenergetic technological changes in evolution.
Implications:
- Thermoeconomics provides a more accurate and comprehensive model for studying energy in biological systems.
- It offers new insights into evolutionary processes driven by energy acquisition and utilization.
- This framework can potentially guide future research in bioenergetics and evolutionary studies.
Related Concept Videos
Statements of the Second Law of Thermodynamics
4.7K
The second law of thermodynamics can be stated in several different ways, and all of them can be shown to imply the others. The Clausius’ statement of the second law of thermodynamics is based on the irreversibility of spontaneous heat flow. It states that heat will not flow from the colder body to the hotter body unless some other process is involved. Additionally, as per the Kelvin’s statement, it is impossible to convert the heat from a single source into work without any other...
4.7K
The Second Law of Thermodynamics
6.4K
In the quest to identify a property that may reliably predict the spontaneity of a process, a promising candidate has been identified: entropy. Scientists refer to the measure of randomness or disorder within a system as entropy. High entropy means high disorder and low energy. To better understand entropy, think of a student’s bedroom. If no energy or work were put into it, the room would quickly become messy. It would exist in a very disordered state, one of high entropy. Energy must be...
6.4K
Second Law of Thermodynamics
26.2K
In the quest to identify a property that may reliably predict the spontaneity of a process, a promising candidate has been identified: entropy. Processes that involve an increase in entropy of the system (ΔS > 0) are very often spontaneous; however, examples to the contrary are plentiful. By expanding consideration of entropy changes to include the surroundings, a significant conclusion regarding the relation between this property and spontaneity may be reached. In thermodynamic models, the...
26.2K
Second Law of Thermodynamics
66.6K
The Second Law of Thermodynamics states that entropy, or the amount of disorder in a system, increases each time energy is transferred or transformed. Each energy transfer results in a certain amount of energy that is lost—usually in the form of heat—that increases the disorder of the surroundings. This can also be demonstrated in a classic food web. Herbivores harvest chemical energy from plants and release heat and carbon dioxide into the environment. Carnivores harvest the...
66.6K
The Carnot Cycle and the Second Law of Thermodynamics
3.5K
The Carnot engine works between two heat reservoirs of fixed temperatures. The Carnot cycle begs the following question: Is it possible to devise a heat engine that is more efficient than a Carnot engine between two fixed temperatures? The answer lies in designing a Carnot refrigerator.
Since the individual steps in a Carnot cycle can be reversed, the entire cycle is, thus, reversible. If a Carnot cycle is reversed, it becomes a Carnot refrigerator. It extracts heat Qc from a cold reservoir at...
Since the individual steps in a Carnot cycle can be reversed, the entire cycle is, thus, reversible. If a Carnot cycle is reversed, it becomes a Carnot refrigerator. It extracts heat Qc from a cold reservoir at...
3.5K
Entropy and the Second Law of Thermodynamics
4.4K
The second law of thermodynamics can be stated quantitatively using the concept of entropy. Entropy is the measure of disorder of the system.
The relation between entropy and disorder can be illustrated with the example of the phase change of ice to water. In ice, the molecules are located at specific sites giving a solid state, whereas, in a liquid form, these molecules are much freer to move. The molecular arrangement has therefore become more randomized. Although the change in average...
The relation between entropy and disorder can be illustrated with the example of the phase change of ice to water. In ice, the molecules are located at specific sites giving a solid state, whereas, in a liquid form, these molecules are much freer to move. The molecular arrangement has therefore become more randomized. Although the change in average...
4.4K

