Question

At which temperature $\mathrm{\beta }-\mathrm{sulfur}$ is stable.

Answer 1

Allotropes

• Allotropes are two or more forms of the same elements that exist in the same physical state (solid, liquid, or gas) but have physical and chemical properties that differ from one another.
• The most important allotropes of sulfur are yellow rhombic ($\mathrm{\alpha }-\mathrm{sulfur}$) and monoclinic ($\mathrm{\beta }-\mathrm{sulfur}$).

$\mathrm{\beta }-\mathrm{sulfur}$

1. $\mathrm{\beta }-\mathrm{sulfur}$is monoclinic sulfur.
2. Its melting point is $393\text{K}$ and specific gravity $1.98$.
3. At $369\mathrm{K}$, $\mathrm{\beta }-\mathrm{sulfur}$ is stable.