Q 11-12-159NEETNEET 2022Top questionMedium
The volume occupied by the molecules contained in $4.5$ kg water at STP, if the intermolecular forces vanish away is
Answer: (A) $5.6\ \text{m}^3$
Without intermolecular forces the molecules behave as an ideal gas.
Moles of water: $n = \dfrac{4500\ \text{g}}{18\ \text{g/mol}} = 250$ mol.
At STP one mole of an ideal gas occupies $22.4$ L:
$$V = 250 \times 22.4\ \text{L} = 5600\ \text{L} = 5.6\ \text{m}^3$$
Solution by Sreeraj P, M.Sc Physics