Question

3rd law of thermodynamics Explain in easy language​

Answer 1

The third law of thermodynamic states that as the temperature of a system approaches absolute zero, its entropy becomes constant, or the change in entropy is zero. The third law of thermodynamics predicts the properties of a system and the behavior of entropy in a unique environment known as absolute temperature.

The entropy of a bounded or isolated system becomes constant as its temperature approaches absolute temperature (absolute zero).

Thermodynamics is one of the most important and widely studied branches of physical science. Other than tormenting mechanical engineering students for most of their academic lives, its ubiquity is seen from the cold breeze of my air conditioner to one of the pinnacles of the industrial age – the steam engine. Its implementation is governed by three laws, which are known as the Laws of Thermodynamics. The laws define how work, heat and energy affect a system. A system is any region in the Universe that is finitely bounded across which energy is transferred. Everything outside this boundary is its surroundings.


This unusable energy is measured by something called “Entropy”, a barometer for measuring randomness or disorder in a system.

Considering the Universe as one system, there is nothing in its surroundings to derive energy from, so with all its energy converted to unusable energy, all that is left behind is a cold, dark place. This is called the heat death and is one of the ways the Universe could end. A bounded system like our Universe possesses finite sources of energy, such as its bright stars, which will burn for aeons before surrendering to the cruel laws of nature.

Answer 2

Answer:

3rd law of thermodynamics states that the temperature of the system reach's absolutely 0. it's entropy becomes constant or change in entropy is 0.