The temperature at which water vapourises into steam is called-

Open in App

Solution

Heat of vaporization:
The energy needed to change a specific quantity of a substance from the liquid state to the gaseous state at a certain pressure is known as the heat of vaporisation.
At 100°C, water vaporisation heat is 540 cal/g.
Water:
Boiling point refers to the temperature at which water vaporises into steam.
The hydrogen bonds involving the water molecules begin to dissolve as the water reaches its boiling point.
Water changes from a liquid to a gas when it reaches the temperature required for vaporisation.

Suggest Corrections

Similar questions

When water is heated to a temperature X, it gets converted into steam at temperature X by a process called R. And when steam at temperature X is cooled, it reconverted into the water at the same temperature X by a process called S.

(a) How much is the value of X in Kelvin?

(b) What is the process R called?

(d) What is process S known as?

(e) What is the name of energy released during the process S known as?

Explain why organic liquid vapourises at a temperature below its boiling point in its steam distillation.

if temperature is constant during vapourisation then how does steam cause better burns in comparison of water at 100 c.

When water is boiled to 100 $^{\circ}$ C, it converts into steam which on condensation gives back water. Here, the heat given out is called latent heat of condensation which is equal to the latent heat of vapourisation.

Q. The increase in internal energy of

1

kg of water at

100^{0} C

when it is converted into steam at the same temperature and at

1 a t m

(100 k P a)

will be [The density of water and steam are

1000 k g / m^{3}

and

0.6 k g / m^{3}

respectively. The latent heat of vapourisation of water is

2.25 \times 10^{6} J / k g

] :

Join BYJU'S Learning Program