10_1425_web_Lec_35_SecondLawEngines

10_1425_web_Lec_35_SecondLawEngines - The Second Law of...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
The Second Law of Thermodynamics: Heat Engines Physics 1425 Lecture 35 Michael Fowler, UVa
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
The First Law of Thermodynamics In any process, total energy is always conserved . Once it was fully realized that heat is just another form of energy, it was established with many experiments on an immense variety of processes, mechanical, electrical, chemical, nuclear, etc., that in all processes in nature total energy doesn’t change. So only processes that conserve total energy are allowed, but that’s not the whole story
Background image of page 2
The Second Law of Thermodynamics Extensive experimentation and observation have established that some total energy conserving processes actually never occur in nature (or in the lab): Heat energy will never flow by itself from a cold body to a hot body. There is no way to devise a cyclic engine that takes heat from a reservoir, does work, and has no waste heat left over. Both the above are Statements of the Second Law .
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 10

10_1425_web_Lec_35_SecondLawEngines - The Second Law of...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online