Question

explain fully 2nd law of td

Answer 1

The Second Law of Thermodynamicsstates that the state of entropy of the entire universe, as an isolated system, will always increase over time. Thesecond law also states that the changes in the entropy in the universe can never be negative.

Answer 2

The second law of thermodynamics states that the total entropy can never decrease over time for an isolated system, that is, a system in which neither energy nor matter can enter nor leave. The total entropy can remain constant in ideal cases where the system is in a steady state (equilibrium), or is undergoing a reversible process. In all other realcases, the total entropy always increases and the process isirreversible. The increase in entropy accounts for the irreversibility of natural processes[according to whom?], and theasymmetry between future and past.

Historically, the second law was an empirical finding that was accepted as an axiom ofthermodynamic theory. Statistical thermodynamics, classical or quantum, explains the microscopic origin of the law.

The second law has been expressed in many ways. Its first formulation is credited to the French scientist Sadi Carnot, who in 1824 showed that there is an upper limit to the efficiency of conversion of heat to work, in a heat engine.
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