Specific latent heat

What is specific latent heat?

The energy required to change the state of 1 kg of a substance without changing its temperature.

What is the formula for specific latent heat?

Q=mL, where Q is energy, m is mass, and L is specific latent heat.

What are the units of specific latent heat?

Joules per kilogram (J/kg).

What is the specific latent heat of fusion?

The energy required to change 1 kg of a substance from solid to liquid.

What is the specific latent heat of vaporization?

The energy required to change 1 kg of a substance from liquid to gas.

How does specific latent heat differ for different substances?

It depends on the substance's molecular structure and bond strength.

Why doesn’t temperature change during latent heat transfer?

The energy goes into changing the state, not increasing kinetic energy.

What factors affect the total energy required for a change of state?

The mass of the substance and the specific latent heat.

How can you experimentally determine specific latent heat?

Measure the energy supplied and the mass of the substance, then use L=Q/m

What is the role of specific latent heat in evaporation?

It explains why evaporation absorbs heat from the surroundings.

What type of latent heat is involved in freezing?

Latent heat of fusion.

What happens to the energy released when steam condenses?

It is transferred to the surroundings as latent heat of vaporization.

Why is the specific latent heat of vaporization usually higher than that of fusion?

More energy is required to separate particles completely in the gas phase.

How does high specific latent heat be

Water's high latent heat of vaporization helps regulate body temperature through sweating.

What is the specific latent heat of fusion for ice?

Approximately 334,000 J/kg