[quote=The_J]
Nimda, can you explain exactly what you mean by changing their enthalpy levels? Moving their electrons, weakening the nuclear attraction, some other shizzle?
[/quote]

Enthalpy is energy as it relates to mass, volume, and specific heat. [quote=whizzball1]
I only have a vague idea of what enthalpy is! By that I mean I know exactly what it is but I have no idea how it applies to anything else in physics or chemistry!
[/quote]

You use it a lot in thermodynamics.