Change of State

Which of these changes can be reversed?

Why does the cloud not getting frozen at very high height?

Name the type of vaporization that occurs on the surface of a liquid as it changes into a gas.

The phenomenon of _____ gives a cooling effect to the remaining liquid.

What happens in the process of solidification?

What is normal melting point?

Define triple point of a substance.

Describe the dependence of boiling point of a liquid on pressure.

List the differences between boiling and evaporation.

Define the term vaporisation with an example.

The boiling point increases with a decrease in pressure.

Bubbling effect is not visible in evaporation.

What is solidification?

Define the boiling point of substance.

Identify the boiling point of water from the given temperature versus time graph for heating of ice.

Identify the melting point of ice from the graph.

Explain latent heat of fusion of ice.

Define latent heat of fusion.

Water and ice having equal masses are placed inside an insulated container. The initial temperatures of water and ice are $40°\mathrm{C}$ and $0°\mathrm{C}$ respectively. The equilibrium temperature of the system in degrees Celsius is close to (Note: take the specific heat of water $=4000 \mathrm{J}·{\mathrm{kg}}^{-1}·{\mathrm{K}}^{-1}$; latent heat of fusion $=300 \mathrm{kJ}·{\mathrm{kg}}^{-1}$ )

What is normal melting point?