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When Q is negative... it will indicate that the quantity... transformed... from heat into work.

— Rudolf Clausius The Mechanical Theory of Heat (1867)

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More quotes by Rudolf Clausius

The entropy of the universe tends to a maximum.

The Mechanical Theory of Heat (1867)

The energy of the universe is constant.

The Mechanical Theory of Heat (1867)

T is simply the absolute temperature.

The Mechanical Theory of Heat (1867)

Theorem of the equivalence of Heat and Work. ...Mechanical work may be transformed into heat, and conversely heat into work, the magnitude of the of the one being always proportional to that of the other.

The Mechanical Theory of Heat (1867)

[A]ccording to Mariotte and Gay-Lussac's law,center|1=p = \frac{a+t}{v} \cdot \text{const}.

The Mechanical Theory of Heat (1867)

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