What is the volume of water condensed from 1 cu.mtr of steam at 1 atmp press?

Answer 1

Please specify the temperature of the steam, which is not necesary to be 100°C.
Let me solve this problem by assuming the steam temperature be 100°C. Also I will assume the density of water is 1g/ml, since you have not specify the water temperature either.
Use ideal gas law: n = PV/RT = 1*1000/(0.08206*373.2) = 32.65 (moles)
which is 588.4g since the molar mass of water is 18.02g/mol.
Hence the volume of water condensed from 1 cu.mtr of steam at 1 atm pressure is 588.4ml.