# Meaning of red heat

I have two reactions below.

What is the difference between red heat and normal heat? Is it related to iron as a catalyst when it is red hot?

• Red heat is normal heat, quite a bit hotter than 473K. It is not related to iron in any way. Jan 18 '19 at 13:42
• All black bodies (at least the ones that don't decompose when hot) emit essentially the same radiation. The colour of that is a good indicator of the temperature. Red heat is the temperature where things glow red whether they are glass or steel or some other inert substance. And that is pretty hot (as the answer says 500-600 °C). Jan 18 '19 at 15:51
• I removed second question that was homework question. read carefully.
– A.K.
Jan 18 '19 at 23:55

$$\begin{array}{c|c} \mathbf{Color} & \mathbf{Temperature(°C)} \\\hline \text{Faint red } & \text{500}\\ \text{Blood Red} & \text{580} \\ \text{Dark Cherry } & \text{635}\\ \text{Medium Cherry } & \text{690}\\ \text{Cherry} & \text{745}\\ \text{Bright Cherry} & \text{790}\end{array}$$