Formula For Specific Latent Heat Of Fusion (2023)

FAQs

Formula For Specific Latent Heat Of Fusion? ›

Specific Latent Heat of Fusion Formula

The specific latent heat (L) of a material… is a measure of the heat energy (Q) per mass (m) released or absorbed during a phase change. is defined through the formula Q = mL. is often just called the "latent heat" of the material.

Q = m L v Q = m L v (for vaporization/condensation), where L f L f is the latent heat of fusion, and L v L v is the latent heat of vaporization. The latent heat of fusion is the amount of heat needed to cause a phase change between solid and liquid.

Details of the calculation: ΔS = ΔQ/T. ΔQ = -mL, m = mass of water, L= latent heat of fusion = 333000 J/kg. ΔS = -(0.5 kg)(333000J /kg)/273 K = -610 J/K.

C = Q / (∆T m) is the formula. Answer: The heat or energy required during a constant volume process to change the temperature of a substance of unit mass by 1 °C or 1 °K is measured in J/kg K or J/kg C, as it is the heat or energy required to alter the temperature of a substance of unit mass by 1 °C or 1 °K.

The amount of heat energy released or absorbed when a solid changing to liquid at atmospheric pressure at its melting point is known as the latent heat of fusion.

Specific latent heat is denoted by L and it is a measure of the heat energy (Q) per mass (m) released or absorbed during a phase change. It can be defined through the formula: Q=mL and its SI unit is Joule per kilogram (J/kg).

The specific latent heat of fusion of water is 334,000 J/kg.

The latent heat of fusion is the enthalpy change of any amount of substance when it melts. When the heat of fusion is referenced to a unit of mass, it is usually called the specific heat of fusion, while the molar heat of fusion refers to the enthalpy change per amount of substance in moles.

The specific latent heat of a substance is the amount of energy needed to change the state of 1 kg of the substance without changing its temperature. Each substance has two specific latent heats: latent heat of fusion (the amount of energy needed to freeze or melt the substance at its melting point)

What is the SI unit for specific latent heat of fusion? ›

The SI unit of specific latent heat is J/Kg or Jkg^-1.

The specific latent heat of water is: l f = 3 ⋅ 34 × 10 5 J k g − 1 for fusion (solid→liquid) or freezing (liquid→solid) l v = 22 ⋅ 64 × 10 5 J k g − 1 for vaporisation (liquid→gas) or condensation (gas→liquid)

Hence, we can conclude that The specific latent heat (L) of a material: It is a measurement of the amount of heat energy (Q) emitted or absorbed per mass (m) during a phase shift. The formula Q = mL is used to describe it. It's commonly referred to as the material's "latent heat."

The latent heat of va- porization Lv is defined as the difference in enthalpy between a fixed mass of vapor and the same mass of liquid. That is Lv = Hvap − Hliq. Similarly, the latent heat of fusion is given by Lf = Hliq − Hsol, and the latent heat of sublimations is given by Ls = Hvap − Hsol.

Hence, we can conclude that The specific latent heat (L) of a material: It is a measurement of the amount of heat energy (Q) emitted or absorbed per mass (m) during a phase shift. The formula Q = mL is used to describe it. It's commonly referred to as the material's "latent heat."

If m kg of solid converts to a fluid at a constant temperature that is its melting point, the heat consumed by the substance or the latent heat of fusion formula is expressed as. Q = m × L. Wherein. L = specific latent heat of fusion of substance.

Q = MLf Eq. 1. where Q is the amount of heat absorbed by the solid, M is the mass of the solid that was melted and Lf is the latent heat of fusion for the type of material that was melted, which is measured in J/kg, NOTE: to fuse means to melt.