Lower density

  1. Is there any liquid that has lower density than petrol.
    one more point : it should not be a fuel.Is there any?
     
  2. jcsd
  3. Borek

    Staff: Mentor

    Liquid helium.
     
  4. DrDu

    DrDu 4,090
    Science Advisor

    Borek, I fear this forum is slowly mutating you into a physicist!
     
  5. Borek

    Staff: Mentor

    :devil:
     
  6. thanks.
    But liquid helium does'nt exist in liquid form in room temperature.
    Is there any other liquids less dense than petrol and exists as liquid in room temperature.
     
  7. Borek

    Staff: Mentor

    You are moving goalposts now :tongue2:

    And I am not convinced you told us all. What will be the next condition? And what does it mean "not a fuel"?

    Not that I can think of any substance that is liquid at RTP, has a density around 0.7 g/mL and is not a hydrocarbon.
     
  8. DrDu

    DrDu 4,090
    Science Advisor

    How about Hydrogen cyanide? Boiling Point 25 deg. Celsius, Density 0.68 g/cm^3. Not used as a fuel as far as I know although it is highly inflammable. It is used both as a reactant and a solvent in the Gattermann synthesis.
     
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