In thermodynamics, the second law is shorthand for the second law of thermodynamics along with other synonyms, including: the second main principle, the entropy law, law of entropy, Clausius inequality, the law of increasing entropy. [1]

See also
● Zeroth law
First law
● Third law
Joule’s second law
● Newton’s second law

References
1. Bent, Henry A. (1965). The Second Law: an Introduction to Classical and Statistical Thermodynamics. Oxford University Press.

TDics icon ns