To keep dry ice in solid form, the surrounding temperature must be maintained at what level?

To keep dry ice in solid form, the surrounding temperature must be maintained at what level?

• A. -105°F
• B. -125°F
• C. -155°F
• D. -200°F

Answer: (B)

To keep dry ice in solid form, the surrounding temperature must be maintained at approximately -78.5°C (-109.3°F). Among the options provided, -125°F is the closest to this temperature. At this level, dry ice can remain solid without sublimating into carbon dioxide gas, which occurs at higher temperatures. Maintaining a temperature significantly below this point, as seen in the choice of -155°F or -200°F, while not detrimental, is not necessary for the stability of dry ice. Therefore, -125°F is an appropriate temperature that ensures the dry ice remains solid during storage and handling, making it the best answer in this scenario.

To keep dry ice in solid form, the surrounding temperature must be maintained at approximately -78.5°C (-109.3°F). Among the options provided, -125°F is the closest to this temperature. At this level, dry ice can remain solid without sublimating into carbon dioxide gas, which occurs at higher temperatures.

Maintaining a temperature significantly below this point, as seen in the choice of -155°F or -200°F, while not detrimental, is not necessary for the stability of dry ice. Therefore, -125°F is an appropriate temperature that ensures the dry ice remains solid during storage and handling, making it the best answer in this scenario.