Temperature, pressure and phase changes in pure substance

Question 1

_________ is a process in which the molecules at the surface of the liquid escape to the vapour phase

Answer 1

Vapourization. The pressure inside the vessel will start increasing.

Question 2

When more and more molecules go from the liquid state to the vapour
state, some molecules present in the vapour phase near the surface of the liquid go
back to the liquid state. This process is known as ___________.

Answer 2

Condensation

Question 3

_________ is defined as the pressure exerted by the vapours in equilibrium with
the liquid at a specific temperature

Answer 3

Vapour pressure

Question 4

when is dynamic equilibrium attained?

Answer 4

When the rate of vapourization becomes equal with the rate of condensation

Question 5

when the vapour pressure becomes equal to the external pressure, the liquid starts to ________

Answer 5

boil

Question 6

when the external pressure is equal to 1 atm, the boiling point is known as ________

Answer 6

normal boiling point