Question

What is the density of ice at 32°F and 1 atm?

What is the density of liquid water at 32°F and 1 atm?

As pressure increases the boiling temperature of water increases or decreases?

As pressure increases the freezing temperature of water increases or decreases?

How has the fact that water expands when it freezes shaped our world?

Answer 1

1.

Density of ice at 32⁰F and 1 atm is 0.917 g/cm³

2.

Density of liquid water at 32⁰F and 1 atm is 1 g/cm³

3.

As pressure increases, the energy required to boil a liquid increases because boiling point is the point where the vapour pressure equals or exceeds the atmospheric pressure. so boiling point of water increses when pressure increases.

4.

Tripple point is a point from where freezing point increases from 0^oCat 1 atm pressure upto 0.01^oC at 0.006 atm pressure. At pressure below this point water will never be a liquid so when pressure increases the freezing temperature of water also increases.

5. When water is cooled it gets contracted till the 4^oCAfter that, it expands slightly until it reaches the freezing point. Since water is made up of hydrogen bonds and hydrogen bonds gets stronger with lowering the temperature and it takes the shape of hydrogen bonded lattice structure which expands the structure.