Law Of Thermodynamics
There are four laws of thermodynamics and are given below:
- Zeroth law of thermodynamics
- First law of thermodynamics
- Second law of thermodynamics
- Third law of thermodynamics
Zeroth Law of Thermodynamics
The Zeroth law of thermodynamics states that if two bodies are individually in equilibrium with a separate third body, then the first two bodies are also in thermal equilibrium with each other.
First Law of Thermodynamics
First law of thermodynamics, also known as the law of conservation of energy states that energy can neither be created nor destroyed, but it can be changed from one form to another.
Second Law of Thermodynamics
Second law of thermodynamics states that the entropy in an isolated system always increases. Any isolated system spontaneously evolves towards thermal equilibrium — the state of maximum entropy of the system.
Third Law of Thermodynamics
Third law of thermodynamics states that the entropy of a system approaches a constant value as the temperature approaches absolute zero.
As explained above, entropy is sometimes called waste energy that is unable to do work, and since there is no heat energy at absolute zero, there can be no waste energy. Entropy is also a measure of the disorder in a system, and while a perfect crystal is perfectly ordered, any positive value of temperature means there is motion within the crystal, which causes the disorder. For these reasons, there can be no physical system with lower entropy, so entropy always has a positive value.
The science of thermodynamics has been developed over centuries, and its principles apply to nearly every device ever invented. Its importance in modern technology cannot be overstated.
Thermodynamics Examples in Daily Life
Whether we are sitting in an air-conditioned room or travelling in any vehicle, the application of thermodynamics is everywhere. We have listed a few of these applications below:
- Different types of vehicles such as planes, trucks and ships work on the basis of the 2nd law of thermodynamics.
- The three modes of heat transfer work on the basis of thermodynamics. The heat transfer concepts are widely used in radiators, heaters and coolers.
- Thermodynamics is involved in the study of different types of power plants such as nuclear power plants, thermal power plants.
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