Question

20. Which of the following will sublime at room temperature and pressure? a) ice
(B) Graphite
(C) Solid carbon dioxide (dry ice)
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Answer 1

Answer:

SOLID CARBON DIOXIDE (DRY ICE ) IS THE CORRECT ANSWER BRO

PLS FOLLOW ME AND PLS MARK AS BRAINLIEST

Answer 2

The correct answer is option (C) Solid carbon dioxide (dry ice)

Explanation:

• The melting curve of CO2, in contrast to that of water, slopes up and to the right. Since liquid CO2 cannot exist at pressures lower than 5.11 atm, the triple point is defined as 56.6 °C and 5.11 atm.
• Therefore, solid CO2 sublimes immediately to vapor at 1 atm while preserving the standard sublimation temperature of 78.5°C.
• Due to its frigid solid-state and lack of a liquid phase that appears when it is warmed, solid CO2 is frequently referred to as "dry ice."

Hence solid carbon dioxide (dry ice) will sublime at room temperature and pressure.

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