By what factor does water expand when converted into vapour at 100°C and 1 atm pressure? The density — States of Matter and Gaseous State Chemistry Question

💡 Solution & Explanation

take 1 mole (18 g) of h2o. v_vapour = nrt/p = 1 × 0.0821 × 373 / 1 = 30.62 l = 30,620 cm^3. v_liquid = mass/density = 18 g / 0.96 g/cm^3 = 18.75 cm^3. expansion factor = v_vapour / v_liquid = 30,620 / 18.75 = 1633 ≈ 1630.