Latent Heat of Fusion

Q.

Identify the substance that is more effective in cooling.

1. Water at ${80}^{\circ }C$
2. Water at ${100}^{\circ }C$
3. Ice at $0^{\circ }C$
4. Steam at ${100}^{\circ }C$

Q. Latent heat of fusion is the heat energy that is absorbed by the solid without showing any rise in the temperature.

1. True
2. False

Q. The amount of heat energy required to change 1 kg of solid into liquid at its melting point is known as_________.

1. latent heat of fusion
2. latent heat of condensation
3. latent heat of vaporisation
4. latent heat of sublimation

Q. The latent heat of fusion converts phase to phase.

1. solid
2. liquid
3. gaseous
4. plasma

Q. Which of the following will have the highest latent heat of vaporisation?

1. Water
2. Ethanol
3. Acetone
4. Ether

Q.

Choose the correct statement regarding the conversion of ice into water.

1. Ice converts into water by releasing heat.

2. Ice converts into water by absorbing heat.

3. It is not possible to convert ice into water.

4. Ice neither absorbs nor releases heat while converting into water.

Q. Which of the following statements are correct for latent heat?

1. Latent heat of fusion is the energy absorbed during melting.
2. Latent heat of vaporization is the energy absorbed during boiling.
3. Latent heat of fusion is the energy absorbed during boiling.
4. Latent heat of vaporization is the energy absorbed during melting.

Q. When ice cubes are heated, the temperature when the melting point is reached.

1. decreases
2. increases
3. remains constant

Q. The amount of heat energy required to change 1 kg of solid into liquid at its melting point is known as_________.

1. latent heat of condensation
2. latent heat of vaporisation
3. latent heat of fusion
4. latent heat of sublimation

Q. The amount of heat energy required to change 1 kg of solid into liquid at its melting point is known as_________.

1. latent heat of fusion
2. latent heat of condensation
3. latent heat of vaporisation
4. latent heat of sublimation