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Introduction to Latent Heat Fusion
Latent heat is heat that happens in chemistry when a substance changes physically without altering temperature as a result of energy release or absorption. The latent heat of fusion of ice and the latent heat of fusion of water differ. Not only that, but it also has a distinct latent heat of fusion. In the following description, various formulas are explained.
In this article, we will learn more about the latent heat of fusion.
Define latent heat of fusion
The latent heat of fusion definition is given by the amount of heat energy necessary to convert 1kg of solid to liquid at its melting point at atmospheric pressure. When the pressure in the atmosphere is kept constant, it is also known as the enthalpy of fusion.
When a substance goes through a phase transition, it indicates that its phase changes from solid to liquid. Then it is referred to as the melting point.
Latent heat of fusion formula
Latent heat is the amount of heat required per kilogram to change the state of an item.
The MKS (meter-kilogram-second) method measures time in joules per kilogram (J/kg).
The specific latent heat (L) of a substance is a measurement of the thermal energy (Q) emitted or absorbed per mass (m) during a phase change.
Mathematically, latent heat of fusion formula is written as
L = Q / M
where,
L = a substance’s specific latent heat
Q = quantity of heat
M = the substance’s mass
This equation illustrates how much heat Q must be added or removed for a mass m object to change phases. L keeps track of the object’s specific latent heat in latent heat of fusion formula.
Latent heat of fusion of Ice
The latent heat of fusion of ice is the amount of heat necessary to alter the state of ice, i.e., to transform the ice into water with no change in its temperature. Ice has a latent heat of 334 J/g.
Latent heat of fusion of water
The amount of heat generated by water when 1 unit mass of water is turned into ice at a constant temperature is defined as the latent heat of fusion of water. The specific latent heat of fusion of water is 334,000 J/kg.
Define latent heat of fusion and latent heat of vaporization
The amount of heat energy absorbed by a unit mass of a solid at a constant temperature to convert it to a liquid phase is termed the specific latent heat of fusion. At the same time, the specific latent heat of vaporisation is the amount of heat energy absorbed by a unit mass of a liquid to change it into a gaseous phase at a constant temperature.
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Latent heat of fusion examples
The latent heat of fusion examples is given as:
- Ice melting necessitates the absorption of latent heat of fusion in order to transform it from a solid to a liquid state.
- When water boils, it absorbs the latent heat of vaporization and converts to steam.
- Food is dehydrated by sublimation during the freeze-drying process, in which the latent heat of sublimation is absorbed to remove water from the food.
- As water vapour condenses into liquid droplets, the development of dew on grass or the generation of rain in the atmosphere releases latent heat of condensation.
- Sweating has a cooling impact because sweat evaporates from the skin and absorbs the latent heat of vaporisation from the body, which helps to regulate body temperature.
Frequently Asked Questions on Latent Heat of Fusion
What is latent heat of fusion?
The latent heat of fusion (or melting) of a solid is the amount of heat in joules necessary to convert 1 kilogramme of the solid (at its melting point) to liquid with no temperature change. Ice has a latent heat of fusion of 3.34 × 105 joules per kilogramme (or 3.34 × 105 j/kg)
What is the formula for latent heat of fusion, and what are some examples?
L = m * L signifies the specific latent heat of fusion of the material. As the temperature of the substance varies from t1 (low temperature) to t2 (high temperature), the heat that the material absorbs or releases is represented by Q = mcΔt. The total amount of heat received or emitted by the substance is given by Q = mL + mcΔt.
What is latent heat of fusion application?
It has numerous applications. The most common and straightforward application of the heat of fusion is melting ice into water.
What is latent heat and its types?
At constant temperature and pressure, latent heat is the amount of heat absorbed or released by a substance undergoing a change of state, such as ice changing to water or water changing to steam. Types: The material exists in three states: solid, liquid, and gaseous.
