Hess’s Law and ΔH – Let’s Practice! AP Chemistry Unit 6, Topic 9

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In this video, Mr. Krug shows students how Hess’s Law works and how we can manipulate several individual equations to calculate the change in enthalpy of a separate equation. In this video, Mr. Krug works multiple problems, solving for ΔH using Hess’s Law.

00:00 What Is Hess’s Law?
02:04 Example Problem 1 – Manipulating 2 Equations
04:44 Example Problem 2 – Manipulating 3 Equations