The triple point of CO₂ is at 5.2 atm and -57°C.Under atmospheric conditions present in a typical Boulder,Colorado,laboratory (P = 630 torr,T = 23°C),solid CO₂ will: A)remain solid B)boil C)melt D)sublime E)none of these

Question

Quizplus · Accepted Answer

The triple point of a substance is the condition where all three phases (solid, liquid, and gas) coexist in equilibrium. At the triple point, the vapor pressure of the solid is equal to its liquid and gas phases. Any condition above or below the triple point will favor one of the phases, leading to a change in phase. In this case, since the atmospheric conditions in the laboratory are above the triple point of COS, it will not remain solid but will sublime directly to the gas phase. Therefore, the answer is D, sublime.

The Triple Point of CO2 Is at 5

The Triple Point of CO₂ Is at 5