Question

What is the melting and boiling point of water?

Answer 1

Hint : The temperature at which water transforms from solid ice to liquid water is known as the melting point. Water's boiling point varies depending on air pressure. The boiling point is lower at lower pressures and higher elevations.

Complete Step By Step Answer:
In two ways, water can boil, raise the temperature, or lower the air pressure. At sea level, the pressure of air causes water to boil at ${100^ \circ }C$ . In the absence of air, water can boil at a significantly lower temperature. That is, if it weren't for the skin, which keeps the blood compressed, body temperature would be high enough to cause the blood to boil. When air pressure is low, water boils at temperatures well below ${100^ \circ }C$ .
The temperature at which the liquid water vapour pressure equals the pressure surrounding the body and the body changes into a vapour is known as the boiling point of water. The boiling point of a liquid is the temperature at which it begins to boil. Water, for example, has a boiling point of ${100^ \circ }C$ at a pressure of $1atm$ . The boiling point of a liquid is determined by its temperature, air pressure, and vapour pressure.
The melting point of water is the temperature at which it changes from solid ice into liquid water. The solid and liquid phase of water are in equilibrium at this temperature. The melting point depends slightly on pressure, so there is not a single temperature that can be considered to be the melting point of water. However, for practical purposes, the melting point of pure water ice at 1 atmosphere of pressure is very nearly $0^\circ C$ , which is $32^\circ F$ or $273.15{\text{ }}K$ .

Note :
The boiling point of organic compounds will reveal important physical and structural characteristics. The boiling point of a substance aids in its identification and characterization. A liquid with a greater boiling point has a higher boiling point than one with a lower boiling point.