Question

1. Explain the following terms
What is Sublimation
What is Condensation
What is Evaporation
What is Melting


2. State whether the the following are reversible and irreversible

Melting of candle wax
Heating of water
Rusting of iron
Burning of paper ​

Answer 1

Answer:

what is sublimation

• Sublimation is the transition of a substance directly from the solid to the gas state, without passing through the liquid state.

what is condensation

• 1 small drops of liquid that are formed when warm air touches a cold surface
• the process of changing a gas to a liquid

What is Evaporation

• Evaporation is a type of vaporization that occurs on the surface of a liquid as it changes into the gas phase. The surrounding gas must not be saturated with the evaporating substance. When the molecules of the liquid collide, they transfer energy to each other based on how they collide with each other.

what is melting

• to change or make something change from a solid to a liquid by means of heat

• used about somebody’s feelings, etc.) to become softer or less strong

Answer 2

1. The phenomenon of change of solid directly to gas or conversion of gas directly to liquid without changing into liquid state is called Sublimation.

2. the mass of tiny droplets formed by the condensation of water vapour which we see floating high in the atmosphere is called a cloud. the formation of clouds involves the process of condensation. the changing of water vapour into liquid water on cooling is called Condensation.

3. the process of a liquid changing into vapour (or gas) even its boiling point is called Evaporation.

4. The process of a substance to change from a solid to a liquid is called Melting.

2.

a) reversible

b)irreversible

c)irreversible

d) irreversible