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3 Basic laws of thermodynamics

Laws of thermodynamics

Table of Contents

LAWS OF THERMODYNAMICS

The basic principles of thermodynamics form the basic for the study of bio energetixs. Thermodynamics principles are applied to describe the various aspects of livings system. Thermodynamics describes the energy and work and also the conversions within and among the energy and work.
Thermodynamics principles are given as laws of thermodynamics.

FIRST LAW OF THERMODYNAMICS

The first law of thermodynamics states that the total energy of the universe is constant. Energy can neither be created nor be destroyed. But the energy can be converted from one form to another. The first law is also known as law of conservation of energy among the three laws of thermodynamics .
The universe is made up of many systems and surroundings. For example:- an animal, an organ, a cell, chloroplast, mitochondria, a chemical reaction, etc. are biological systems. The rest of the universe is called the surroundings or environment. Every system in equilibrium has a particular internal energy. Energy can be exchanged between the system and the surroundings according to the laws of thermodynamics

SECOND LAW OF THERMODYNAMICS

The second law of thermodynamics states that the entropy of any isolated system always increases and never decrease. Entropy is energy in a state of randomness and disorder. It is unavailable, useless energy. The entropy of a system increases when it becomes more disordered. Entropy becomes maximum in a system as it approaches equilibrium.

THIRD LAW OF THERMODYNAMICS

The third law of thermodynamics states that the entropy of a system approaches a constant value as the temperature approaches absolute Zero.

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