Why does iodine, I₂ (s), spontaneously sublime at room temperature? A)The contact of iodine, I₂ (s), with the water vapor in the air causes the sublimation process. B)Iodine, I₂ (s), pulls O₂ from the air as it self-oxidizes under sublimation to I₂ (g). C)There is an increase in entropy as solid iodine, I₂ (s), sublimes into iodine vapor, I₂ (g), because in the gaseous phase energy is more readily dispersed. D)The reaction of I₂ (s)subliming to I₂ (g)is highly exothermic and therefore proceeds spontaneously.

Question

Quizplus · Accepted Answer

Sublimation of iodine, I₂ (s), is spontaneous at room temperature because it results in an increase in entropy. In the gaseous phase, energy is more readily dispersed, leading to greater entropy than in the condensed solid phase. This favors the sublimation process, which occurs spontaneously without the need for external energy input or a favorable change in enthalpy. The other options (A, B, D) are not accurate explanations for the spontaneous sublimation of iodine at room temperature.

Why Does Iodine, I2 (S), Spontaneously Sublime at Room Temperature

Why Does Iodine, I₂ (S), Spontaneously Sublime at Room Temperature