Latent Heat of Fusion Definition
The heat required per unit mass to change a substance from a solid state to a liquid state, without altering its temperature or pressure, is defined as the latent heat of fusion.
This energy is necessary to break the bonds that hold the molecules in a fixed position within the solid lattice.
The specific latent heat of fusion (\(L_f\)) is calculated using the formula:
\(L_f = \frac{Q}{m}\)where \(Q\) is the heat absorbed and \(m\) is the mass of the substance undergoing the phase change.
Distinguishing Fusion from Other Processes
It is crucial to differentiate latent heat of fusion from other related terms:
- Regelation: This is a phenomenon where ice melts under pressure and refreezes when the pressure is reduced. It relates to the effect of pressure on the melting point.
- Sublimation: This is the transition directly from solid to gas, bypassing the liquid phase.
- Vaporisation: This is the phase transition from liquid to gas.
Only the latent heat of fusion specifically addresses the energy needed for the solid-to-liquid transition at constant temperature and pressure.
Similar Questions
Which of the following options does NOT represent a property of solids?
Which of the following statements is correct about continuous movement of particles of matter?
Which of the following options does not represent a property of suspension?
The particle size of a solution is:
In our body, brain and spinal cord together constitute the:
Solid CO2 gets converted directly into the gaseous state upon decreasing the pressure to _________.
Which of the following is an example of heterogeneous solution?
Which of the following examples shows that particles of matter have enough?
- When 1 kg of water is cooled from \(4^\circ\text{C}\) to \(0^\circ\text{C}\), its volume ______.
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Important Questions from States of Matter
Which is correct statement ?
According to Charle's Law, which of the following is constant?
Which of the following statements is/are correct?
I. Mass vapor is obtained in the air by evaporation and transpiration.
II. Water circulation between the oceans and the water bodies is called the water cycle.
Which of the following statements is not correct regarding matter?
'Laughing Gas' is:
