In this video, we shall discuss the First law of thermodynamics both qualitatively and quantitatively. By the end of this video, you should have a good understanding of: Internal energy, work, and heat, and how they relate to each other. We will also discuss reversible process and isochoric (constant volume) and isobaric (constant pressure) heat transfer. I will also throw in a classic thermodynamics example question and answer it quantitatively by applying the first law of thermodynamics and some trivial maths.