Hardness of Solid Substances - Grinding Sulfur
Sulfur can easily be ground to a fine powder.
sulfur
Plastic Sulfur - Part 1 of 5
At room temperature sulfur is a yellow solid.
Plastic Sulfur - Part 2 of 5
Solid sulfur is placed in a beaker and then heated in a bunsen burner flame. As the solid is heated, it begins to melt and a reddish brown liquid forms.
Plastic Sulfur - Part 3 of 5
As molten sulfur is heated to 180 degrees Celsius, the free-flowing liquid thickens and becomes very viscous.
Plastic Sulfur - Part 4 of 5
When viscous molten sulfur is heated to 200 degrees Celsius, more S-S bonds break and the sample is able to flow.
Plastic Sulfur - Part 5 of 5
The cooled sulfur has become a flexible plastic.