(28) Account for the following:
(a) The temperature of water remains constant during boiling,
(b) Evaporation is a surface phenomenon.
(c) The space between constituent particles is maximum in the gaseous state
Answers
a This is due to the latent heat of boiling which is used up to convert water into vapour.
b In evaporation, the first layer gets heated and turns into vapour and hence it is a surface phenomenon.
c The gases have least inter particular force of attraction and hence there is lots of space between their constituent particles.
Pls mark my answer brainliest
Answer:
(a) Once a liquid starts boiling, there is no increase in average kinetic energy upon further heating. The heat now supplied is used to overcome intermolecular forces only. Therefore, the temperature of water remains constant during boiling.
(b) Molecules or particles of a liquid present on the surface have an urge or desire to escape from the surface as vapours in order to increase their free movement or randomness. This is known as evaporation. Thus, evaporation is a surface phenomenon. More the surface area available more will be the rate of evaporation.
(c ) In the gaseous state of matter the interparticle forces are the least. Therefore, interparticle spaces are the maximum.
mark as brainlist