The phase diagram for sulfur is shown here. The rhombic and monoclinic states are two solid states with different structures. a. Below what pressure does solid sulfur sublime?

Video transcript

Hey everyone, we're given the phase diagram for crystalline carbon and we know that carbon has two crystal forms which are diamond, colorless cubic crystals and graphite, soft black hexagonal crystals. Crystalline carbon. Sublime is below what pressure? So first let's go ahead and think about what we know of sublimation as we've learned. Sublimation is the transition of a substance from a solid state into a vapor state. Now, when we assess this phase diagram, we can see that diamond right here is in its solid state and also down here for graphite, graphite is in its solid state. And from this phase diagram we can see that only graphite is able to go from that solid state into that vapor state. So sublimation will be below the melting point pressure, which is also known as the triple point pressure. So to answer this question, crystalline carbon will sublime below 0. giga pascal, which can be seen right here at the triple point pressure. Now, I hope this made sense. And let us know if you have any questions