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24 juillet 2023 - 14:12
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The First & Zeroth Laws of Thermodynamics: Crash Course Engineering #9
In today’s episode we’ll explore thermodynamics and some of the ways it shows up in our daily lives. We’ll learn the zeroth law of thermodynamics, what it means to reach a thermal equilibrium, and define the first law of thermodynamics. We’ll also explore how stationary, adiabatic, and isochoric processes can make our lives as engineers a little easier.
Note: Different branches of engineering sometimes define the first law of thermodynamics differently, depending on how work is defined. Essentially, work released from a system might be defined as a positive value or a negative value, and thus the first law can be defined as either Q-W or Q+W. Both are acceptable forms, depending on how the system is defined! We chose to focus on only one definition here to limit the confusion.
Crash Course Engineering is produced in association with PBS Digital Studios: https://www.youtube.com/playlist?list=PL1mtdjDVOoOqJzeaJAV15Tq0tZ1vKj7ZV
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RESOURCES:
Çengel, Yunus A., and Michael A. Boles. Thermodynamics: An Engineering Approach. 8th ed., McGraw-Hill Education.
http://web.mit.edu/16.unified/www/FALL/thermodynamics/notes/node15.html
https://www.livescience.com/50776-thermodynamics.html
https://www.khanacademy.org/test-prep/mcat/chemical-processes/thermochemistry/a/endothermic-vs-exothermic-reactions
https://www.wired.com/2014/12/whats-inside-hot-hands/
http://www.chemistryislife.com/the-chemistry-of-hand-warmer
http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/thereq.html
https://www.grc.nasa.gov/www/k-12/airplane/thermo0.html
http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/firlaw.html
http://www.physicsclassroom.com/class/energy/Lesson-1/Kinetic-Energy
http://www.physicsclassroom.com/class/energy/Lesson-1/Potential-Energy
https://www.realclearscience.com/blog/2014/01/the_physics_of_getting_punched_in_the_face.html
http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/inteng.html
https://www.britannica.com/science/internal-energy
https://www.nuclear-power.net/nuclear-engineering/thermodynamics/thermodynamic-processes/isochoric-process-isometric-process/
https://www.britannica.com/science/enthalpy
http://pillars.che.pitt.edu/student/slide.cgi?course_id=12&slide_id=35.0
https://courses.lumenlearning.com/boundless-physics/chapter/the-first-law-of-thermodynamics/
https://www.khanacademy.org/science/biology/energy-and-enzymes/the-laws-of-thermodynamics/a/the-laws-of-thermodynamics
http://www.ftexploring.com/energy/first-law_p2.html
https://water.usgs.gov/edu/hyhowworks.html
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