Solid iodine will sublime into bright-violet iodine gas when it is heated. A student heated some iodine crystals, placed them in a closed vessel, and observed the iodine crystals sublime to iodine vapors. As the vessel filled with iodine vapors, the intensity of the violet color increased with time. After some time, however, the intensity of the color became constant. Why did this occur?

Question

anonymous · Answer

A.The rate of solidification is higher than the rate of sublimation.

B.The solidification of the iodine vapors stopped.

C.The sublimation of the iodine crystals stopped.

D.The system reached dynamic equilibrium.

somy · Answer

what do u think?

anonymous · Answer

I honestly don't know. im so confused.

somy · Answer

hmmm what is the reaction that is happening?

somy · Answer

no rather what is actually happening do u understand?

anonymous · Answer

I got it, the teacher helped me, it was D (: