In triple point,all phases of water, vapour,Liquid water and ice is @ equilibrium.
The triple point of water is zero degree Celsius this is because 1)zero degree Celsius is the melting point of ice. 2)water changes from liquid to solid in zero degree Celsius.
At the triple point, all three phases of water coexist in equilibrium: solid (ice), liquid, and gas (water vapor). This is the point where the three phases can exist simultaneously under specific conditions of temperature and pressure.
triple point of water is chosen as standard fixed point because in this point it represent a unique value of pressure and temperature at which solid,liquid,gases states of the substance are equally stable and co-exist.
The fiducial point on the Kelvin temperature scale is the triple point of water, which is defined as 273.16 K. This point is used as a reference to calibrate the Kelvin scale.
The triple point of water is a specific temperature and pressure at which water can exist as a solid, liquid, and gas simultaneously. The SI unit for temperature is the kelvin (K), which is defined based on the triple point of water (273.16 K). This relationship helps ensure consistency and accuracy in temperature measurement.
The triple point of a phase diagram is the location where the solid, liquid, and gas phases meet; it is the temperature and pressure at which a given substance can assume any of the 3 usual phases of matter.
At the triple point, a substance exists in equilibrium as a solid, liquid, and gas simultaneously. This point represents the unique combination of temperature and pressure where all three phases can coexist in thermodynamic equilibrium.
Until recently, this would have been, by definition, the triple point - where water is in three states (solid, liquid or vapour). However, the defined temperature for triple point is now 0.01oC. However, for practical purposes water is at the triple point and could be in any of the three states.
The triple point of water occurs at a specific temperature of 0.01 degrees Celsius and a pressure of 611.657 pascals, where water can exist in solid, liquid, and gas states simultaneously.
solid, liquid, gas phases in equilibrium
Boiling point: 100 0C Freezing point: 0 0C (and 0,01 0C based on the triple point of water)