basically i lost my notes on the reactions of the hydrogen halides. i need to know which of hydrogen chloride, bromide and iodide decomposes in heat and what you observe. oh and if possible an equation for it.
Hi, I'm not sure if your talking about the right chemicals here BUT the hydrogen halides that you have mentioned are all gases as they have very low boiling points:
Boiling Points: HI = -35, HBr = -66 and HCl = -85
but I preassume they can decompose and the most obvious decomposition would be: