00:01
Defining each word in the term standard molar enthalpy of formation may not make much sense unless you combine at least a couple terms together.
00:10
Standard refers to standard state.
00:14
So the process at which we are determining an enthalpy, a heat exchange, is going to occur when everything, reactants, and products are in their standard state.
00:25
If you don't remember what standard state is, you might need to review that.
00:29
For a gas, it's one bar.
00:31
For a solute in solution, it's one molar.
00:34
For an element, it's the element in its pure form, as defined by what its standard state is.
00:43
For example, hydrogen is h2.
00:52
Then next i'll define enthalpy.
00:54
Anthopy is heat exchange at constant temperature.
00:58
So we're measuring the heat exchange at constant temperature for a process where everything is in its standard state...
