https://pure.psu.edu/en/publications/on-the-first-law-of-thermodynamics-for-open-systems/
On the first law of thermodynamics for open systems - Penn State
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https://www.pearson.com/channels/physics/learn/patrick/the-first-and-second-laws-of-thermodynamics/first-law-of-thermodynamics
First Law of Thermodynamics Explained: Definition, Examples, Practice & Video Lessons
Master First Law of Thermodynamics with free video lessons, step-by-step explanations, practice problems, examples, and FAQs. Learn from expert tutors and get...
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https://chadsreviews.teachable.com/courses/elementary-physical-chemistry/lectures/1923108
2.1 Introduction to the First Law of Thermodynamics (12:05) | Chad's
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https://en.wikipedia.org/wiki/First_law_of_thermodynamics?ref=bernardleong.com
First law of thermodynamics - Wikipedia
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