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

Question

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

G1 Physics · Accepted Answer

Step 1: When intermolecular forces vanish, treat water molecules as an ideal gas at STP. Step 2: Number of moles: n = 4500 g/(18 g mol⁻¹) = 250 mol. Step 3: Use PV = nRT, with T = 273 K and P ≈ 1.013 × 10⁵ Pa. Step 4: V = nRT/P = (250 × 8.31 × 273)/(1.013 × 10⁵) ≈ 5.60 m³. Final answer: (D) 5.6 m³.