What is latent heat Short answer?
Latent heat is defined as the heat or energy that is absorbed or released during a phase change of a substance. It could either be from a gas to a liquid or liquid to solid and vice versa. Latent heat is related to a heat property called enthalpy.
What does latent heat describe?
Latent heat (also known as latent energy or heat of transformation) is energy released or absorbed, by a body or a thermodynamic system, during a constant-temperature process — usually a first-order phase transition.
What is the formula of latent heat in physics?
Ans: 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).
What is the purpose of latent heat?
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.
How do you calculate latent heat?
Latent heat calculation. All we need to know to compute the latent heat is the amount of substance and its specific latent heat. The formula is: Q = m * L, where. m [kg] is the mass of the body, L [kJ/kg] is the specific latent heat, Q [J] is the heat absorbed or released depending on the direction of the transition.
What is latent heat, and why is it called that?
The heat required to change the phase of a substance without raising its temperature is called latent heat. Literally, the term latent means hidden; therefore, this energy is hidden within the molecules until a phase change occurs. If you’ve paid attention, in the case of water, heat is enough to cause a phase change.
What’s the difference between latent heat and sensible heat?
The main difference between latent heat and sensible heat is that latent heat is defined for a system that undergoes a phase change of matter whereas sensible heat is defined for a system that has no change in the phase of matter.
What is the formula of latent heat?
Answer: The latent heat is given by the equation: Q= m L. substituting the value of m, and the specific latent heat. Q= 0.5 Kg * 334 KJ/Kg = 167 KJ = 167000 J. This is the amount of energy released when water is melting at 0 °C.