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Title: Iodine sublimation
Caption: Iodine sublimation. Iodine at room temperature is a black solid. Gentle heating results in the formation of a purple gas. This solid-gas transition is known as sublimation. The vapor recrystallizes on the cool surfaces of the tube, and is purified in the process.
Credit: Album / Science Source / Charles D. Winters
Image size: 2550 × 3848 px | 28.1 MB
Print size: 21.6 × 32.6 cm | 1003.9 × 1515.0 in (300 dpi)