Intro: Carnot Efficiency & the Quality of Energy


2nd Carnot Principle

combined with
the Kelvin or Ideal Gas Scale led to:
Efficiency of reversible HE's such as the

Carnot Cycle

In this lesson, we will show that this equation for

Carnot Efficiency

leads to the idea that energy has a quality as well as a quantity.
In other words, some Joules of energy are better or more valuable than others!
The quality or value of a Joule of energy depends on how useful it is.
We will show that work is the most useful or valuable form of energy.
We will also see that heat is more valuable when it is stored or available at a higher temperature.
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Ch 6, Lesson G, Page 1 - Intro: Carnot Efficiency & the Quality of Energy