Can All Solids Be Liquefied by Increasing Pressure?

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Not all solid substances can be liquefied by simply increasing pressure; phase diagrams are essential for understanding their behavior under varying conditions. Ice, dry ice, and sulfur can potentially be liquefied with sufficient pressure, while diamond and graphite typically cannot. At 1 atm pressure, nitrogen, helium, hydrogen, and carbon dioxide cannot be liquefied, whereas water can. The discussion emphasizes the importance of temperature and phase diagrams in determining the liquefaction of solids. Understanding these principles is crucial for solving related homework problems effectively.
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Homework Statement



Which of the following solid substances can be liquefied simply by increasing the pressure suffciently?
ice (H2O)
diamond (C)
dry ice (CO2)
sulfur (S)
graphite (C)

Which of the following substances cannot be liquified at 1 atm pressure?
nitrogen (N2)
helium (He)
hydrogen (H2)
water (H2O)
carbon dioxide (CO2)

Homework Equations





The Attempt at a Solution


I know that some of them are solids, liquids and gases in standard state but I don't know which can be liquified etc. help?
 
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