Question

The volume of 1 L water upon vaporisation at STP is nearly

• A. 124.3 L
• B. 1 L
• C. 22.4 L
• D. 1243.2 L

Answer 1

The correct option is D 1243.2 L

The density of water is 1 kg/L and its molar mass is 18 g/mol:
So, the number of moles of water in 1 L=$\frac{1000}{18}=55.5mol$
We know that, at STP, one mole of an ideal gas occupies a volume of 22.4 liters. Therefore, the volume of 55.5 moles of an assumed-to-be ideal gas = $22.4\times 55.5L=1243.2L$