10.4 Real Gases & the Van der Waals Equation

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    Real Gases

    Real gases experience attractive forces.

    For real gases, the molecules have volume.

    real gases compression factor

    Van der Waals Equation

    van der waals equation

    +an2 / V2 corrects for attractive forces

    -nb corrects for repulsive forces (as molecules do have volume)

    Van der Waals Constants
    a
    b
    H2 0.244 0.0266
    N2 1.39 0.0391
    CH4 2.25 0.0428

    1 mole of CH4 at a temperature of 100K has a volume of 8.2L.
    Calculate its pressure if it is behaving ideally.
    Calculate its pressure using the Van der Waals equation.

     

     

    1 mole of CH4 at a temperature of 100K has a volume of 0.50L.
    Calculate its pressure if it is behaving ideally.
    Calculate its pressure using the Van der Waals equation.