Rudolf Clausius Quotes

6 Sourced Quotes

Heat cannot of itself pass from a colder to a hotter body.

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.
Statement of the second law of thermodynamics, 1862

Rudolf Clausius
If for the entire universe we conceive the same magnitude to be determined, consistently and with due regard to all circumstances, which for a single body I have called entropy, and if at the same time we introduce the other and simpler conception of energy, we may express in the following manner the fundamental laws of the universe which correspond to the two fundamental theorems of the mechanical theory of heat.
1. The energy of the universe is constant.
2. The entropy of the universe tends to a maximum.

Rudolf Clausius
In all cases where work is produced by heat, a quantity of heat proportional to the work done is expended; and inversely, by the expenditure of a like quantity of work, the same amount of heat may be produced.

Rudolf Clausius
Heat can never pass from a colder to a warmer body without some other change, connected therewith, occurring at the same time.

Rudolf Clausius
The careful experiments of Joule, who developed heat in various ways by the application of mechanical force, establish almost to a certainty, not only the possibility of increasing the quantity of heat, but also the fact that the newly-produced heat is proportional to the work expended in its production.

Rudolf Clausius