Anonymous asked in Science & MathematicsChemistry · 1 decade ago

Which of the following substances cannot be liquified at 1 atm pressure? ?

nitrogen (N2)

carbon dioxide (CO2)

hydrogen (H2)

oxygen (O2)

helium (He)

2 Answers

  • maussy
    Lv 7
    1 decade ago
    Favorite Answer

    carbon dioxide since it sublimes. At 1 atm pressure , it can not exist at all in liquid state. Its triple points has a pressure value lower than 1 atm

  • 1 decade ago

    carbon dioxide. It sublimates from solid to liquid at 1 atm pressure.

    It requires 5.2 atm to melt from solid to liquid.

    Source(s): HANDBOOK of CHEMISTRY and PHISICS, 44th EDITION. Wikipedia.
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