# Thermodynamic Temperature Scales

QC

QH

W

- What if we know the temperature of one thermal

reservoir and we measure QH, QC, and W from

our reversible HE experimentally? - Then, we could calculate η and, if we knew how η depended on TC and TH, we could determine the temperature of the other reservoir !
- This would allow us to construct a temperature scale that does not depend on the working fluid or the properties of any substance. This type of temperature scale is called a Thermodynamic Temperature Scale.
- The objective of this lesson is to determine the functional dependence of η on TC and TH and to use it to develop a Thermodynamic Temperature Scale and to explore how such a scale is related to other temperature scales.

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