Density of water?

[jsmith1]

1 mol of H2O weights 18 g. And 1 mol H2O takes up 22.4 L. Therefore shouldn't the density of water be 18g / 22.4 L = .8g/L?

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[StIGMA]

1 mol of H2O weights 18 g. And 1 mol H2O takes up 22.4 L. Therefore shouldn't the density of water be 18g / 22.4 L = .8g/L?

You are confusing density of a gas vs liquid water.

The weight of 1 mol of a substance is always a constant. The density varies based on temperature/state of the substance. 1 mol of liquid water vs frozen water vs gaseous water has a different density based on its state / temperature.

1 mol of liquid water has a density of 1 g/mL (1kg/L). [vs what you are stating for gas would be 0.0008g/mL]

Anyways, the 22.4L is for 1 mol of an ideal gas at STP. Water is NOT an ideal gas. (at STP, is it NOT a gas, pure water is a solid [ice] at 0C).

 

[jsmith1]

You are confusing density of a gas vs liquid water.

The weight of 1 mol of a substance is always a constant. The density varies based on temperature/state of the substance. 1 mol of liquid water vs frozen water vs gaseous water has a different density based on its state / temperature.

1 mol of liquid water has a density of 1 g/mL (1kg/L). [vs what you are stating for gas would be 0.0008g/mL]

Anyways, the 22.4L is for 1 mol of an ideal gas at STP. Water is NOT an ideal gas. (at STP, is it NOT a gas, pure water is a solid [ice] at 0C).

Thanks a lot.