Question

Find the ratio of boiling point of water and melting point of water in Celsius scale.
a) 0
B) 1oo
C) 1.666
D) not defined

Answer 1

Hint: The temperature at which water exists in solid state and liquid state at atmospheric pressure. OR The melting point (or, rarely, liquefaction point) of a substance is the temperature at which it changes state from solid to liquid. At the melting point the solid to liquid phase exists in equilibrium.

Complete Step by step answer: Boiling point: The temperature at which vapour pressure is equal to external atmospheric pressure.
OR The boiling point of a substance is the temperature at which the vapor pressure of a liquid equals the pressure surrounding the liquid and the liquid changes into a vapour
the boiling point of water =${\text{10}}{{\text{0}}^{\text{0}}}{\text{C}}$
Melting point if water = ${{\text{0}}^{\text{0}}}{\text{C}}$
In Celsius scale
$\therefore $ The ratio of boiling point of water and melting point of water in Celsius scale
= $\dfrac{{{\text{100}}}}{{\text{0}}}{\text{ = undefined}}$
The normal boiling point of a liquid is the special case in which the vapor pressure of the liquid equals the defined atmospheric pressure at sea level, one atmosphere At that temperature, the vapor pressure of the liquid becomes sufficient to overcome atmospheric pressure and allow bubbles of vapor to form inside the bulk of the liquid.

Hence, option “D:” is correct.

Note: When the external pressure is less than one atmosphere, the boiling point of the liquid is lower than its normal boiling point. equal to one atmosphere, the boiling point of a liquid is called the normal boiling point. greater than one atmosphere, the boiling point of the liquid is greater than its normal boiling point.