5.1 Concept and Statements of the Second Law (Why do we need a second law?)
= 5.1 Concept and Statements of the Second Law (Why do we need a second law?)
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Online text: https://web.mit.edu/16.unified/www/FALL/thermodynamics/notes/node37.html
Cited passages: MIT, §5.1, statement 1 and Figure 5.1: complete conversion as the sole result; MIT, §5.1, statement 2 and Figure 5.2: sole-result restriction.