The algebraic sum of all the transformations occurring in a cyclical process can only be positive, or, as an extreme case, equal to nothing.
[Statement of the second law of thermodynamics, 1862]
Autor: Rudolf Clausius
![The algebraic sum of all the transformations occurring in a cyclical process can only be positive, or, as an extreme case, equal to nothing.<br /><br />[<i>Statement of the second law of thermodynamics, 1862</i>] - Rudolf Clausius](/static/img/quotes/779412.jpg)