Gavin Howe
The second law of thermodynamics, which states that entropy, or disorder, increases over time, has been a topic of discussion in the evolution and creation debate. Some argue that this law contradicts the theory of evolution, which claims that organisms become more complex and ordered over time. However, evolutionists counter that the second law only applies to closed systems with no external energy sources, and since the Earth receives energy from the Sun, it does not apply to the development of life. This argument is based on a misunderstanding of the second law and the concept of entropy, which does not conflict with the mechanisms of genetics and evolution.
| Characteristics | Values |
|---|---|
| Second Law of Thermodynamics | Entropy increases over time, systems become more disordered |
| First Law of Thermodynamics | Energy is always conserved, it cannot be created or destroyed |
| Evolution Theory | Current species evolved from simpler earlier life forms |
| Anti-Evolution Argument | Evolution contradicts the Second Law as life forms become more complex over time |
| Counterargument | The Second Law only applies to closed systems with no external energy sources, unlike life on Earth |
| Entropy | A measure of the number of arrangements of particles or how little energy in a system can be converted |
| Scope of Second Law | Applies to the universe as a whole, introducing the concept of time's arrow |
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What You'll Learn
- The second law of thermodynamics applies to closed systems only
- Evolution requires the second law of thermodynamics
- The second law of thermodynamics applies to the universe as a whole
- The second law of thermodynamics is misunderstood
- The second law of thermodynamics and evolutionary theory can't both be correct
The second law of thermodynamics applies to closed systems only
The second law of thermodynamics states that entropy, or disorder, increases over time. This is often misunderstood to mean that "everything always gets more disordered over time". However, this principle only applies to closed systems with no external sources of energy. The Earth, for example, is not a closed system because it receives continual energy from the Sun.
Evolutionary theory claims that organisms become more ordered over time, which would seem to contradict the second law of thermodynamics. However, this argument is based on a misunderstanding of the second law and the concept of entropy. Entropy measures the "disorder" of a system in terms of the number of microstates, or arrangements of molecules, accessible to the system. While the entropy of an individual organism may decrease, the total environmental entropy increases. This is because the construction of an organism releases more energy than it consumes, increasing the thermodynamic entropy as a whole.
Furthermore, the mechanisms underlying genetics and evolution are perfectly in line with physical laws. For example, mutations do not inherently result in a change in entropy in an organism. Instead, they can enable the formation of larger and more complex life forms, such as multicellular life, without violating the second law of thermodynamics.
In conclusion, the second law of thermodynamics only applies to closed systems, and Earth is not a closed system. Therefore, the evolution of life on Earth does not violate the second law of thermodynamics.
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Evolution requires the second law of thermodynamics
The second law of thermodynamics states that entropy, or disorder, increases over time. This is often interpreted as "everything always gets more disordered over time". However, this is a misunderstanding of the law. Entropy can be defined as "a thermodynamic quantity representing the unavailability of a system's thermal energy for conversion into mechanical work". In other words, it is a measure of how useful energy is.
Furthermore, life exists because it is efficient at increasing entropy. The internal entropy of an organism decreases, but this is offset by an increase in the total environmental entropy. This is because the construction of an organism releases more energy than it consumes, thus increasing the thermodynamic entropy of the system as a whole.
Evolutionary theory claims that organisms get better ordered over time, which may seem to contradict the second law of thermodynamics. However, this is not the case. The mechanisms underlying genetics are perfectly in line with physical law. For example, a simple mutation can allow one cell to stick to other cells, enabling a larger and more complex life form. This does not violate the second law of thermodynamics.
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The second law of thermodynamics applies to the universe as a whole
The second law of thermodynamics is a physical law based on universal empirical observation concerning heat and energy interconversions. The law states that the state of entropy of the entire universe, as an isolated system, will always increase over time. Entropy, denoted by the letter S, is a measure of the disorder of a system in terms of the number of microstates—arrangements of molecules—accessible to a system in a given macrostate. In other words, it quantifies how useful energy is to us.
The second law of thermodynamics is often invoked in the evolution/creation debate, with critics claiming that evolution violates the second law because organization and complexity increase in evolution. However, this is a misunderstanding of the second law, which only applies to isolated systems, and the Earth is not an isolated system. The sun's energy, for example, causes an increase in entropy, and life exists because it is efficient at increasing entropy. Thus, evolution requires the second law of thermodynamics.
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The second law of thermodynamics is misunderstood
The second law of thermodynamics is often misunderstood to be in conflict with evolutionary theory. This is based on the notion that the second law of thermodynamics stipulates that entropy, or disorder, always increases over time, and therefore the evolution of complex beings from simpler life forms constitutes a decrease in entropy. However, this argument is based on a flawed understanding of the second law and the concept of entropy, as well as a misunderstanding of the scope of the law's application.
Firstly, it is important to clarify the concept of entropy. Entropy is a measure of the "disorder" of a system, but it is more precisely defined as the number of microstates, or arrangements of molecules, accessible to a system in a given macrostate, which is determined by temperature, pressure, and volume. While it is true that the second law of thermodynamics states that entropy tends to increase, this only applies to closed systems with no external sources of energy. The Earth, however, receives continuous energy from the Sun, and therefore the second law does not contradict the concept of evolution.
Additionally, the argument that evolution violates the second law of thermodynamics fails to consider the mechanisms underlying genetics and evolution. Evolutionary theory explains that organisms become better ordered over time through natural selection and genetic variation. While individual organisms may decrease in entropy as they evolve into more complex forms, the total environmental entropy increases. This is because the construction of an organism releases more energy than it consumes, resulting in a net increase in thermodynamic entropy.
Furthermore, the second law of thermodynamics applies to the universe as a whole, and the entropy of the universe is indeed observed to increase over time. This is consistent with the understanding that the universe began in a highly ordered state and has been evolving towards greater disorder. Therefore, rather than contradicting evolutionary theory, the second law of thermodynamics actually supports the idea that the universe is evolving towards greater entropy.
In conclusion, the notion that the second law of thermodynamics can be used against evolution is based on a misunderstanding of the law itself, the concept of entropy, and the scope of its application. A proper understanding of these concepts reveals that evolutionary theory and the second law of thermodynamics are not in conflict but can be reconciled within a coherent framework.
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The second law of thermodynamics and evolutionary theory can't both be correct
The second law of thermodynamics and evolutionary theory have been a topic of debate, with some arguing that they cannot both be correct. The second law of thermodynamics states that entropy, or disorder, increases over time in a closed system. This is often misunderstood as "everything always gets more disordered over time". This increase in entropy is what some people use to argue against evolution, claiming that the evolution of organisms into more complex beings constitutes a decrease in entropy, or an increase in order, which contradicts the second law.
However, this argument is based on a flawed understanding of both the second law of thermodynamics and evolutionary theory. Firstly, the second law only applies to closed systems with no external sources of energy. The Earth is not a closed system as it receives continuous energy from the Sun, meaning the second law does not apply in this case. Additionally, evolutionary theory does not claim that individual organisms become more ordered over time, but rather that current species evolved from earlier, simpler life forms.
Furthermore, life itself is a way of increasing total environmental entropy. While the internal entropy of an organism may decrease, the construction and functioning of an organism release more energy than they consume, resulting in an increase in total thermodynamic entropy. This is because the internal subsystems of an organism are not closed systems, and the overall increase in entropy of the surrounding systems more than offsets the decrease in entropy within the organism.
In summary, the argument that the second law of thermodynamics and evolutionary theory cannot both be correct is based on misunderstandings of both the second law and evolutionary theory. The second law only applies to closed systems, which the Earth is not, and evolution does not contradict the law as it does not claim that individual organisms become more ordered over time. Therefore, both the second law of thermodynamics and evolutionary theory can be correct and compatible with each other.
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Frequently asked questions
The Second Law of Thermodynamics states that entropy always increases or stays the same over time. This means that the disorder of a system increases over time.
The Second Law of Thermodynamics is often used as an argument against evolution, as evolution results in more complex beings, which constitutes a decrease in entropy. However, this argument is based on a misunderstanding of the Second Law, which only applies to closed systems with no external sources of energy.
The Earth receives continuous energy from the Sun, which means it is not a closed system. Therefore, the Second Law of Thermodynamics does not apply to the Earth and does not contradict the theory of evolution. Additionally, life increases total environmental entropy and the internal entropy of the organism decreases. This is because the entropy changes of surrounding systems that donate energy cause a corresponding increase in entropy that offsets the entropy decrease.
