Heat of Formation Thermochemistry problems solved with 2 different methods.
Thermochemistry Topic 5/15 can be simple understood if you have the right framwork for understanding how the energy is stored and calculated in chemical reactions. In this video I go through using Heats (Enthalpies) of Formation to determine how much heat is released/absorbed for 2 different reactions.
Method 1: Using the Enthalpy diagram and "Products - Reactants" equation
A properly drawn diagram can help you understand where the P-R equation comes from and I explain it in the video for 2 different examples.
Method 2: Using the Hess Law and Energy Cycle
The IB LOVES energy cycles and I run through 2 examples here using this framework
In the end, it doesn't matter which method you use, as long as you are comfortable with the method and reproduce it on a test.
Good luck and happy studying...the exam is only days away!