Question

a) Enumerate the changes that take place inside the matter during the change of states.

b) When a solid melts, its temperature remains the same. Give reason.

Answer 1

a) The changes that take place inside the matter are:

1. the force of attraction either lessens or greatness.

2. the kinetic energy of particles increases or decreases.

3. the inter particle space changes.

b) When a solid melts, its temperature remains the same because the heat energy supplied is utilised to break the bonds between the particles of matter. Therefore the temperature of solid does not change till all the solid melts.