What happens when sulphur is heated in absence of air?
Answer:
If heated enough, it would melt at about 388 K and boil at about 718 K. (that's 115 C and 445 C, respectively.)
It melts. Different things happen for different allotropes.
if you heat sulphur in abscence of air, air can get upset because you didn't waited for him.
it would melt due to heat decomposition, and if the gas created was allowed to mix with air it would form sulphur trioxide and hydrogen sulphide. and smell like rotten eggs bad.
It would melt if you heated it to about 115C
Changes into lower allotropes and finally melys (assuming no air condition is ment).
First the Sulphur will melt to a liquid at 239°F (115°C) and, on further heating, it will boil and vaporise to a gas at 833°F (445°C).
(I note your spelling of Sulphur).
Not much of anything will happen. Oxygen is needed for any type of reaction.
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