<font color="yellow"><br /> Now, liquid lithium is at what temperature? I am looking for sublimate energy or matter to utilize as propulsion, but I need a new zero resistive super-medium that can conduct extreme heat, pressure, and matter.<br /></font><br /><br />I can't say I totally follow your post, jatslo (what does it mean to "conduct matter"?) but being an alkali metal, Li has a relatively low melting point. It will depend on pressure but a rough working temperature for molten Li is about 500 to 1800 Kelvins.<br /><br />Traditionally liquid sodium is used as a coolant in high power density fission reactors because it has a relatively high specific heat capacity for a metal (about 1200J/K/kg versus water at 4200 and most metals at a few hundred) and a high thermal conductivity (140 W/m/K compared to water at 0.6). The low melting point of 370K makes it easier to handle than other liquid metals, though it's still a bit of a headache!<br /><br />Liquid Li's properties are fairly similar, about twice the specific heat capacity but slightly over half the thermal conductivity. It would still make a pretty good "working fluid" for removing large amounts of heat, at least as long as you have somewhere to get rid of the heat at the "far end" of the heat transfer system.<br /><br /><font color="yellow"><br />Yes, I realize lithium is metallic; however, if we could convert metallic lithium to lithium gas and then convert that lithium gas into liquid lithium, we could then utilize liquid lithium as a medium other than water, or is the liquid lithium flammable?<br /></font><br />If you heat a block of solid metallic Li it will melt, become liquid Li. If you heat it (a lot) more it will become gaseous. If you then condense that gas again you won't convert it into anything new and wonderful, just back to the solid or liquid metallic form.<br /><br />Yes, liquid (and solid) Li are flammable.<br /><br /><font color="yellow">Lithium burns white hot and transmutes; what</font>