The
amount of heat required to convert one unit amount of substance from the solid phase to the liquid phase — leaving
the temperature of the system unaltered — is known as the latent heat of fusion. It is also equal to the enthalpy difference between the solid and liquid phases, ΔH
SL
.
How do you find the latent heat of fusion?
The formula of specific latent heat of fusion is given by:
Q = mL
, which is the required specific latent heat of fusion equation.
Where is the latent heat?
Latent heat, energy absorbed or released by a substance during
a change
in its physical state (phase) that occurs without changing its temperature.
What is latent heat of fusion for Class 9?
The latent heat of fusion is defined as the amount of heat gained by a solid object to convert into liquid form without the change in the temperature. If the heat consumed by the substance is (Q), and m is the mass of the solid substance then the latent heat of fusion (L) is given by the formula:
Q=m×LL=Q/m
.
What is specific latent heat of fusion?
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 are two types of latent heat?
Two common forms of latent heat are
latent heat of fusion (melting) and latent heat of vaporization (boiling)
. These names describe the direction of energy flow when changing from one phase to the next: from solid to liquid, and liquid to gas.
What are three types of latent heat?
- Latent Heat of Fusion,
- Latent Heat of Vaporization,
- Latent Heat of Sublimation.
The latent heat is called hidden heat
because it does not reflect as temperature changes
. Latent heat remains hidden during the change of state. The latent heat is used to loosen the bonding between the molecules and atoms during phase change.
What is Class 9 boiling point?
Hint: The temperature at which conversion of liquid on heating takes place at standard atmospheric pressure is called the boiling point of that liquid and the phenomenon is called boiling. Complete step by step solution: … Pure water at standard pressure (1atm) boils at
100∘C
.
Why is it called latent heat of fusion?
Latent heat of fusion is the heat which is required to make 1kg of solid into liquid. This heat remains hidden until solid is completely transferred into liquid. It is called latent heat
because latent means hidden
.
What is latent heat of fusion with example?
For example, the latent heat of fusion of
one kilogram of water
, which is the amount of heat energy that must be supplied to convert 1 kg of ice without changing the temperature of the environment (which is kept at zero degrees celsius) is 333.55 kilojoules.
What is SI unit of latent heat?
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 often just called the “latent heat” of the material. uses the SI unit
joule per kilogram [J/kg]
.
What is specific latent heat?
Specific latent heat is
the amount of energy required to change the state of 1 kilogram (kg) of a material without changing its temperature
. … latent heat of vaporisation – the amount of energy needed to boil or condense the material at its boiling point.
What is the use of latent heat of fusion?
Fusion. The latent heat of fusion is
the heat required for an object to go from the solid state to the liquid state, or vice versa
. Since its value is generally much higher than specific heat, it allows you to keep a beverage cold for much longer by adding ice than simply having a cold liquid to begin with.
What is the value of latent heat of fusion?
The value of latent heat of fusion of ice is
3.36×105JKg−1
in S.I. unit of system. The specific latent heat of vaporization of the system is the heat energy needed to change one kilogram of the material in its liquid state at its boiling point to one kilogram of the material in its gaseous state.
