Join 60,000+ competitive exam aspirants
or with email
Your Cart
SubtotalтВ╣0
TotalтВ╣0
Examoogle тАв User тАв info@examoogle.com тАв EE-2024-8821
Chapter 1 of 12 тАв Page 1 of 248ЁЯФТ Protected PDF тАв Watermarked
Join 60,000+ competitive exam aspirants
Solid CO2тАЛ gets converted directly into gaseous state on decrease of pressure to:
1 atmosphere
5 atmosphere
20 atmosphere
10 atmosphere
1 atmosphere
Solid carbon dioxide, commonly known as 'dry ice', undergoes sublimation at standard atmospheric pressure. This means it transitions directly from a solid phase to a gaseous phase without passing through the liquid state because its triple point lies above the pressure of 1 atmosphere.
Solid carbon dioxide, commonly known as 'dry ice', undergoes sublimation at standard atmospheric pressure. This means it transitions directly from a solid phase to a gaseous phase without passing through the liquid state because its triple point lies above the pressure of 1 atmosphere.
Think of dry ice like a magical block that 'vanishes' into fog. Instead of leaving a puddle of water like a melting ice cube, it turns straight into carbon dioxide vapor, creating the iconic 'smoke' effect often seen in stage performances.
P<PtripleтАЛ тАФ Condition for sublimation where pressure is below the triple point
The state of a substance is determined by the phase diagram of pressure vs temperature. For CO2тАЛ, the triple point is at approximately 5.11┬аatm and тИТ56.4┬░C. Since 1┬аatm is below this triple point pressure, the solid cannot exist in equilibrium with liquid, forcing it to sublimate directly into gas as heat is absorbed.
Dry ice is the solid form of carbon dioxide (CO2тАЛ).
Sublimation is the direct transition from solid to gas.
The triple point of CO2тАЛ is approximately 5.11┬аatm at тИТ56.4┬░C.
At 1┬аatm (standard atmospheric pressure), CO2тАЛ cannot exist as a liquid.
Provides intense cooling without leaving any liquid residue.
Useful for food preservation and scientific experiments.
Sublimates rapidly, requiring specialized insulated storage (coolers).
Can cause frostbite upon contact with skin due to extremely low temperatures.
Industrial cleaning (dry ice blasting).
Stage effects for fog production.
Medical and scientific sample transport.
Triple point of CO2тАЛ occurs at 5.11┬аatm and 216.55┬аK.
Option A is correct because 1┬аatm is below the sublimation pressure threshold.
A is correct тАФ Solid CO2тАЛ (dry ice) undergoes sublimation at 1┬аatmosphere because its triple point pressure is significantly higher (5.11┬аatm).
Always remember that substances sublimate when their operating pressure is lower than the triple point pressure on their phase diagram.
Get instant step-by-step AI explanations, full shift Previous Year Papers (SSC GD, RRB, SSC JE), and regional rank analysis on the official Examoogle App.
Free Download тАв 100K+ Aspirants