Question

Why does a diamond change directly from a solid state to a gaseous state? A diamond is comprised of only ionic bonds. A diamond is comprised of interspersed ionic and covalent bonds. A diamond is formed from hydrogen bonds. A diamond is hexagonal. A diamond is a network solid formed from carbon.

Answer 1

Diamond changes directly from a solid state to a gaseous state because diamond is a network solid formed from a carbon. The process of changing directly from solid state to a gaseous state is called sublimation.
Diamond does not melt at 1 atm. It sublimes to vapor

Answer 2

Diamond change directly from solid state to gaseous state because diamond is a network solid formed from carbon

Diamond is a covalent solid which is formed by network or chain of carbon atoms that are held together by a covalent bond. That is each carbon atom that made up diamond are connected to the next by a c-c covalent bond