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Mechanical Properties Of Fluids

Question
CBSEENPH11019216

If the intermolecular forces vanish then what will be the volume occupied by 1 kg of H2O at N.T.P?

Solution
Mass of H2O = 1 kg
Volume occupied = ?

If the intermolecular force vanishes, water in liquid form will change it's state to gas. 

Number of moles in 1kg of water is given by,

n = 100018 = 5009 molesUsing the ideal gas equation, we have      PV = nRT   V = nRTP = 5009×8.31×2731.01 × 105= 1.2479 m3

1.2479 m3 is the required volume occupied by 1 kg of H2O at NTP.