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How could latent heat be explained?
latent heat, energy absorbed or released by a substance during a change in its physical state (phase) that occurs without changing its temperature. The latent heat is normally expressed as the amount of heat (in units of joules or calories) per mole or unit mass of the substance undergoing a change of state.
What is latent heat give its unit with the help of a suitable graph explain the terms latent heat of fusion and latent heat of vaporisation?
Latent heat can be defined as the amount of heat energy required by a matter to change its state without changing its temperature. Latent heat of the solid means that amount of heat energy absorbed when 1 kg of a substance changes from solid to liquid at its melting point is called latent heat of fusion of the solid.
What is the graph of temperature versus heat for a latent heat process?
Similarly, energy is needed to vaporize a liquid, because molecules in a liquid interact with each other via attractive forces. There is no temperature change until a phase change is complete. The temperature of a glass of lemonade initially at 0 ºC stays at 0 ºC until all the ice has melted.
What could be explained from the straight horizontal line?
Speed or velocity is plotted on the Y-axis. A straight horizontal line on a speed-time graph means that speed is constant. It is not changing over time. A straight line does not mean that the object is not moving!
How do you get latent heat?
Latent Heat
- 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.
- uses the SI unit joule per kilogram [J/kg].
What happens when latent heat is released?
Latent heat of condensation is energy released when water vapor condenses to form liquid droplets. The temperature does not change during this process, so heat released goes directly into changing the state of the substance. It is expressed as kg/mol or kJ/kg.
What is latent heat How is latent heat an important source of atmospheric energy?
When the molecules return to a liquid state the latent heat is released as sensible heat (heat you can feel basically). It is important in the atmosphere because it is the primary factor involved in the formation of convective clouds and the stability/instability of the atmosphere.
What do you mean by latent heat and latent heat of fusion explain?
The amount of heat energy required in the process of melting for a unit mass of solid to be converted into liquid is called Latent heat of fusion. Heat Energy Q=mL. where m is the mass of the substance and L is the latent heat of Fusion.