Matter in Our Surroundings_4

The amount of heat which is used to change the state of matter not for increase the temperature is called

• Latent heat

• Specific heat

• Heat capacity

• None of the above.

Latent heat of fusion is amount of

• heat energy required to change 1 kg solid into liquid completely at its melting point.

• heat energy required to convert 1 kg solid into liquid at room temperature

• heat energy required to change 1 g of solid into liquid completely

• heat energy required to change 1 kg of solid into liquid at any temperature.

Specific latent heat is the amount of energy required to change the state of 1 kg of a substance without changing its (a)   .

Select the state changes that latent heat of fusion applies to.

• melting

• evaporating

• freezing

• condensing

• sublimation

Why are lines B and D flat?

• The ice is melting

• The ice is freezing

• All of the thermal energy is used to break the bonds

• They stopped the stopwatch

• They stopped heating the ice.

The heat absorbed by melting a solid is known as

• latent heat of fusion

• latent heat of solid

• latent heat of liquid

• latent heat of vaporisation

specific latent heat of vaporisation is

• the amount of heat required to change 1 kg of the substance from the solid to liquid phase without change in temperature

• the amount of heat required to change 1 kg of the substance from the liquid to gaseous phase without change in temperature

• the amount of heat required to change the temperature 1 kg of the substance by 1 degree Celcius

What are the two types of latent heat

• Latent heat of vaporization

• Latent Heat Of Fusion

• Latent Heat Of formation

• Latent Heat Of reaction

How much is the latent heat of fusion of ice?

• Latent heat of fusion of ice is 0.333 kJ

• The latent heat of fusion of ice is 33600 J/K.

• The latent heat of fusion of ice 0 °C

• The heat of fusion for ice is 100 °C

Give one word or term for the following descriptions:

Changes from a vapour to a liquid.

(a)