Thermochemistry

[Brandon_Goenawan2O]

Hey guys, I'm slightly confused on this topic. What is the difference between the standard enthalpy of a reaction versus the standard enthalpy of formation?
Can someone please explain.
Thanks.

[Chris Liddicoat]

The Standard reaction enthalpy is when the reactants and products are in their standard states at 1atm. The standard reaction enthalpy of formation is the formation of one mole of a substance from its elements in the elements most stable form. (The most stable form of an element had a standard enthalpy of zero)(If you are still confused the course reader has a great example problem that will clarify :)) Best of luck!!!