Yeah obviously.... Any matter in this universe tries to be more disordered state. By absorbing energy, Liquid state, in which molecules move less freely tries to be move more freely by absorbing energy and changing into gaseous state..
glycogen
Solid, because it goes through a longer process than the Liquid. Thus, the Liquid doesn't need as much energy as a solid.
Entropy. To "cycle" the energy would need to be reused, in reality the energy flows in from the outside and flows back out. (If the system were energy blocked, then all the energy would convert to heat and thus be useless.)
The kinetic energy is lowest in solids, higher in liquids, and highest in gases.
Thermal (heat) energy must be added or removed in order to cause a change of state.
you need the density of the liquid.
You generally need a catalyst or a mechanism to convert the energy. For example to convert fuel (a mass) into thermal energy, oxidizer and a spark are needed.
You can add heat and cause liquid to gasify. Or you can decrease the pressure in the system and cause liquid to gasify. Note that you may gasify liquid and leave suspended or dissolved solids behind. More heat or pressure may be required to convert these remnants to liquid and then gas.
Exothermic reaction
If it is already electrical energy, there is no need to convert something. It isn't quite clear what you want to convert.
Mitochondria needs sugar.
Light IS energy; it is not a SOURCE of energy. You can convert one form of energy into another, if you need to.
The potential energy of a substance decreases when it changes into a liquid. This is because it's losing the heat energy it had when in gas form to become liquid.
Thermal energy is just heat. To convert it to mechanical energy you need some sort of heat engine, like an internal combustion engine or a gas turbine.
glycogen
A cell needs chloroplasts
You need to make a generator