Are there two compound resins that tolerate over 1000°C for glass ...
2014年12月30日 · Silicon-based polymers generally withstand higher temperatures than carbon analogues, but I wasn't able to find any that can approach 1000 C. Fluoro-polymers are another possibility - as you can see from the reference, they tend to have much higher stability in terms of thermal decomposition. There might be a fluoro-epoxy resin out there.
Why is the Haber process carried out at such high temperatures?
On a large scale, ammonia is prepared via the Haber process: $$\\ce{N2(g) + 3H2(g)->2NH3(g)} \\qquad \\Delta _\\mathrm{f}H^\\circ = -46.1~\\mathrm{kJ \\cdot mol ...
heat - At what temperature does carbon dioxide decompose into …
The variation of $\Delta_\mathrm{r} H^\circ$ with temperature is given by Kirchhoff's law, and to simplify things, let's assume that the heat capacities at constant pressure are independent of temperature over the temperature range we are interested in:
What easily accessible material has melting point between 500 °C …
2022年3月2日 · This query lists all materials with a melting point between 500 and 590 degrees Celsius; mostly aluminium alloys. There are some salts in this list on The Engineering Toolbox which qualify too and can be bought online, but e.g. silver iodide (melting point 558°C) is toxic and I would rather avoid that.
At what temperature does charcoal burn? - Chemistry Stack …
2016年9月28日 · If there is a solid in the fire (e.g. the charcoal, glowing embers or smoke, i.e. small solid particles), they will emit black body radiation. The surface of the sun, at first approximation, is a black body that emits white light, corresponding to a surface temperature of about 5,600 degrees Celsius. The color of light bulbs is described by a ...
Effect of Temperature on pH of Water - Chemistry Stack Exchange
2015年10月25日 · This means that for a solution to acidic, its pH must be lower than 7 at 25 degrees. When we increase the temperature to 50 degrees, the pH of a neutral solution is actually 6, not 7. You can check this as if you were find the total concentration of $\ce{H+}$ ions and $\ce{OH-}$ ions, you will find that they both equal $10^{-6}$ .
Liquids that keeps the lowest temperature for the longer time after ...
2016年7月24日 · There is one liquid with an exceedingly high specific heat capacity — at least when compared to all other common liquids. This liquid is water. It will take the more energy to heat water from $0~\mathrm{^\circ C}$ to room temperature than it takes to heat any other common liquid within the same boundaries.
physical chemistry - What is the final temperature of each …
Suppose that $\pu{28 g}$ of silver is initially at $\pu{29.0^\circ C}$. What is its temperature upon absorbing $\pu{2.25 kJ}$ of heat?
phase - At what pressure will hydrogen start to liquefy at room ...
2020年9月21日 · Hydrogen can be stored at relatively high density (in some cases actually higher density than pure liquid hydrogen) at ambient pressure, by reversible formation of electropositive metal hydrides. One of the simplest such proposed storage compounds is [magnesium hydride]. Various Synthesis methods are reported by Wikipedia:
How does protein denaturation speed change with temperature?
2022年3月25日 · If you more appropriately use Kelvins as your unit of temperature (where 0 Kelvin is -273 degrees Celsius - absolute zero, the lowest possible temperature), then 72 degrees Celsius=345 Kelvin so doubling the temperature would give 690 Kelvin = 417 degrees Celsius!