Write a short notes on triple point of water

Definition of Triple point : A point on the phase diagram that represents particular temperature and pressure where the three phases of matter are in equilibrium is called triple point.

At this point pressure 4.58mm of Hg(or) 610.42 Pa and temperature 273.16K.

Ice Line : The line PB is ice line. Along the line PB the solid and water are said to be equilibrium.

This curve have negative slope

Steam line :

The line PA is called steam line. Along the line PA, the water and steam are in equilibrium.

This curve have positive slope

Hoarfrost line: The line CP is Hoarfrost line. Along the line CP, the ice and steam are in equilibrium.

This curve have positive slope.