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  4. The volume occupied by the molecules contained in 4.5 kg water at STP, if the intermolecular forces vanish away is :

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Q. The volume occupied by the molecules contained in $4.5\, kg$ water at STP, if the intermolecular forces vanish away is :

NEETNEET 2022Thermodynamics

Solution:

$V =$ (no. of moles) $(22.4$ litre)
$=\frac{\text { mass }}{\text { molar mass }}\left(22.4 \times 10^{-3} m ^{3}\right.$ )
$=\frac{4.5 \times 10^{3}}{18} \times 22.4 \times 10^{-3} m ^{3}$
$=5.6 \,m ^{3}$