I'm trying to figure out how to say this in a way that makes sense. If I have 5 Joules of energy stored in a capacitor, it seems like this is much more useful energy than say 5 Joules stored as the chemical energy in gasoline.
By this I mean, if you want to use the energy to do something useful, you can always get a higher efficiency using the electrical energy source than burning the gasoline and converting it to useful work either through an internal combustion engine or the Carnot cycle.
Of course if you just want to heat something up, they are identical. However it seems like the electrical energy source has lower entropy than the gasoline energy source. This might not be the correct usage of the word, but it seems like the energy of the electrical source is "less spread out" than that of the gasoline energy source.
Can someone help me understand this concept better, and let me know if this makes any sense at all?