Question

15. Define the following terms a) Diffusion b) Latent Heste) sublimation d) Evaporation
16. Give reason why naphthalene balls disappear with time without leaving any solid?​

Answer 1

Answer:15.

Explanation:

a) The movement of molecules from the region of higher concentration to the region of lower concentration.

b) Latent heat

The hidden heat required to convert the state of matter without increase or decrease in temperature

It is of two types -

1)Latent heat of fusion

Amount of energy required to convert 1kg of solid into liquid at its melting.

2)Latent heat of vaporisation

Amount of energy required to convert 1kg of liquid into gas at its boiling point.

c) Sublimation

The process in which solid directly changes into gas without melting

d) Evaporation

It is the surface phenomenon by which liquid changes into gas.