Measuring energy changes

IB Chemistry: Measuring energy changes

All fossil fuels provide their energy through an exothermic reaction involving combusting the fuel in air.1. Problems with enthalpy diagramsIt is not difficult to find enthalpy level diagrams in books or on the Internet and most teachers will draw out simple ones themselves. The typical diagram below which actually gives the values for two specific reactions, one exothermic and one endothermic is from the website

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