Second law of thermodynamics in Biology [Mechanical engineering]

Second law of thermodynamics in Biology

The Laws of Thermodynamics

Definition:The laws of thermodynamics are important unifying principles of biology. These principles govern the chemical processes (metabolism) in all biological organisms.

The First Law of Thermodynamics, also know as the law of conservation of energy, states that energy can neither be created nor destroyed. It may change from one form to another, but the energy in a closed system remains constant.

The Second Law of Thermodynamics states that when energy is transferred, there will be less energy available at the end of the transfer process than at the beginning. Due to entropy, which is the measure of disorder in a closed system, all of the available energy will not be useful to the organism. Entropy increases as energy is transferred.

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What is the second law of thermodynamics in biology?

There are two laws of thermodynamics:
1: energy cannot be created or destroyed but can be transferred from one form to another. For example, potential energy to kinetic energy
2: the total entropy of the universe is constantly increasing.
In biology the second law shows up in the requirement of organisms to consume outside energy to survive and give off energy as they convert that energy to usable form. Animals have to eat. Plants usually need light to power photosynthesis. Decaying matter in compost heaps gives off heat as the decomposition takes place. Pretty much all biological processe…

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