Question

How would you summarize the second Law of Thermodynamics?

Answer 1

Hint : The given question is a conceptual question. In order to answer the given question we need to know all the concepts of thermodynamics. Then we can write about the second law of thermodynamics. We need to define thermodynamics and then the laws.

Complete step by step answer
Step one
First of all we need to define thermodynamics.
So, thermodynamics is the branch of science which deals with the relation between heat and other forms of energy.
There are four laws of thermodynamics.
Step two
Now according to the question, we need to define the second law of thermodynamics.
So, the second law of thermodynamics deals with energy conservation. According to it the entropy is constant. In other words, the processes that involve the transfer or conservation of heat energy are irreversible.
For the second law of thermodynamics two scientists named Kelvin and Planck gave their theory.
According to Kelvin Planck theory it is impossible to make a device that will convert the heat from a high temperature source into an equal amount of work.

Note: Zeroth law of thermodynamics: It states that if two systems are in thermodynamic equilibrium with a third system, then they are in thermal equilibrium with each other.
First law of thermodynamics: It states that energy is always conserved. Mathematically, it is written as $\Delta U = Q - W$
Second law of thermodynamics: It states that the entropy of an isolated system can never decrease over time, and is constant if and only if all processes are reversible in nature.
Third law of thermodynamics: It states that the entropy of a system at absolute zero is constant.