Who first defined temperature $T$ such that $\frac{1}{T} = \frac{\delta S}{\delta U}$, and where and when?

It could not have been Thomson, right? He did not have an entropy concept. Clausius?

  • $\begingroup$ One should look at work of Poincaré who has developed a good part of the mathematical apparatus of thermodynamics. $\endgroup$ – Jean Marie Becker Apr 14 at 21:18

Thermodynamic temperature is defined as pV = RT, where p is pressure, V is the Volume, R the ideal gas constant and T the temperature.

Clausius in "The Mechanical Theory of Heat: With Its Applications to the Steam-engine and ..." (1864 ?) first introduced the concept of entropy as the integral dQ/T = dS.

The form that you give came much later and is the statistical mechanics definition of temperature. When exactly it was first defined I can't say.

| improve this answer | |

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.