Which substance can retain large amounts of heat for long periods?

Question

I need a substance which can retain heat for long periods of time.
Will liquid sodium be enough. If so where do we get it?

Answer 1

How much heat, against what gradient and for how long are vital to your question's getting a reasonable answer.

Water, for example has a high heat capacity and can retain quite a lot of heat for a fairly long time if insulated. But the temperature maximum is the boiling point of water, so even with all the heat it retains, you can't use it to ignite something.

Liquid sodium has a much lower heat capacity, so pound for pound will hold much less heat than water. But the temperature maximum is the boiling point of sodium (883C), which is hot enough to ignite many materials.

Rock has been used to retain heat for long periods. Even though its heat capacity is not even 1/5 that of water, it doesn't evaporate and can be heated to a maximum temperature much higher than the boiling point of water or even sodium.

The devil is in the details...

Answer 2

Water has a much higher specific heat than sodium, it's much safer and much cheaper. It has even been proposed to use underground tanks of water to absorb heat in summer to keep roads ice-free in winter. Water is such an efficient heat storage medium that below a depth of a few hundred feet, the ocean temperature is a constant 4 degrees Celsius, all year round, from the tropics to the polar regions.

Answer 3

honestly all the alcohol does no longer cook dinner off. regardless of the very undeniable reality that each human being previous solutions imagine it does. the surely alcohol that cooks off id the alcohol on the exterior of the product cooking. it is authentic for wine, beer, and "not straightforward liquors" rum, vodka, etc. i know i'm the surely one giving this answer so some distance besides the undeniable fact that it would want to be examined as perfect with the help of going to the nutrients community website.

Answer 4

water stone

Answer 5

commun water or heavy water

Answer 6

stone.