Answers 1) The molar volume of liquid water is [itex]0.0000188m^3/mol[/itex] viz. 0.0188 liters/mol.

The molar volume of gaseous water is [itex]0.03053150574 m^3/mol[/itex] viz. 30.53150574 liters/mol.

2) The average distance between nearest-neighbor water molecules in the liquid phase is 315 pm and in the gaseous phase 3701 pm.

3) From ideal gas equation, the computed value of molar volume of gaseous water is [itex]0.030994688722 m^3/mol [/itex] The error, expressed as a percentage of the computed value in question 1 is [itex]\frac{0.030994688722 m^3/mol}{0.03053150574 m^3/mol}=101.517[/itex]%

4) The molar volume of gaseous water at 1 bar and 372,78 K is [itex]0.0305338 m^3/mol[/itex] viz.30.5338 liters/mol. The error, expressed as a percentage of the computed value in question 1 is [itex]\frac{0.0305338m^3/mol}{0.03053150574m^3/mol}=100.075144[/itex]%

5) The molar volume of gaseous water at 1 bar and 372.78 K from van der waals' equation is [itex]0.000140306968475 m^3/mol[/itex] viz.0.140306968475 liters/mol.

The error, expressed as a percentage of the computed value in question 1 is [itex]\frac{0.000140306968475m^3/mol}{0.03053150574 m^3/mol}=0.459548[/itex]%

6)What are your comments on the results of questions 3,4 and 5? At this temperature, would you expect the accuracy to increase or decrease at lower pressure?