The specific latent heat of a substance is the quantity of heat energy required to change the state of a unit mass of a substance. EL=ml where EL is the heat transferred, in joules, m is the mass, in kilograms, and l is the latent heat in joules per kilogram. The SI unit for specific latent heat is Jkg−1.
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What is latent heat short note?
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 is latent heat with example?
Therefore, like the heat of fusion, the latent heat of vaporization measures the heat given to a liquid in order to change its state into its gaseous state. In case of water, the latent heat to transform it into vapour is the energy of boiling water at which it changes form without change in temperature.
What is latent heat and its types Class 11?
Latent heat is the quantity of heat absorbed or released by a substance undergoing a change of state, such as ice changing to water or water to steam, at constant temperature and pressure. Types: There are three phases of the substance: solid, liquid and gaseous.
Why is latent heat called so?
About 970 Btu of additional heat is required to vaporize one pound of water into one pound of steam (2256.2 kJ/kg). This is called latent heat because it cannot be measured by a thermometer.
What is latent heat Toppr?
Latent heat is known as the heat required to convert a solid into a liquid or vapour phase. According to its phase, it has different names like the heat of condensation, the heat of vaporization, etc. Sometimes it is the amount of heat energy absorbed or released for a phase change.
What is latent heat and sensible heat?
Latent and sensible heat are types of energy released or absorbed in the atmosphere. Latent heat is related to changes in phase between liquids, gases, and solids. Sensible heat is related to changes in temperature of a gas or object with no change in phase.
What is the SI unit specific latent heat?
J k g – 1. Explanation for correct option: (c) Specific latent heat is the amount of heat energy that is required to change the state of a unit mass of a substance. Its SI unit is J k g – 1 .
Why is latent heat important?
Latent heat plays a very important role in the atmosphere. This is the factor that finds its place during the formation of convective clouds and thus the stability of the atmosphere. At the point when latent heat is taken or given out, it produces instability in the climate, conceivably delivering extreme climate.
Where is latent heat used?
Examples of Latent and Sensible Heat Boiling water on a stove occurs when thermal energy from the heating element is transferred to the pot and in turn to the water. When enough energy is supplied, liquid water expands to form water vapor and the water boils. An enormous amount of energy is released when water boils.
What are the 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 is latent heat in Brainly?
Latent heat is the energy released or absorbed by a body or a thermodynamic system. Explanation: – Latent heat is the energy of a body during a constant-temperature process which is given by. L=Qm. where Q is the energy released or absorbed at a phase transition and m is the mass of the system.
What is called 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 by BYJU’s?
The heat required to change the state of a substance without any change in temperature is known as latent heat.
What is the SI unit of latent heat of fusion?
∴ Unit of latent heat will J kg−1.
What is the formula of total latent heat?
It is a measurement of the amount of heat energy (Q) emitted or absorbed per mass (m) during a phase shift. The formula Q = mL is used to describe it. It’s commonly referred to as the material’s “latent heat.”
What is latent heat of water?
Changing of phase undergoes a heat transfer, but the temperature of the substances remains constant. So, the heat necessary for phase changes of water from solid to liquid or gas, or liquid to solid or gas, without any temperature alteration is known as latent heat of water.
Is latent heat potential energy?
Latent heat is a form of internal or potential energy stored by evaporated or melted water. As ice melts or liquid water evaporates, the molecules change state — from a solid to a liquid, from a liquid to a gas, or from a solid directly to a gas.
What is latent heat of fusion Ncert?
Latent heat of fusion, also known as enthalpy of fusion, is the amount of energy that must be supplied to a solid substance (typically in the form of heat) in order to trigger a change in its physical state and convert it into a liquid (when the pressure of the environment is kept constant).
What is latent heat capacity?
Solution : Latent heat capacity of a substance is defined as the amount of heat energy required to change the state of a unit mass of the material.
What is heat explain?
heat, energy that is transferred from one body to another as the result of a difference in temperature. If two bodies at different temperatures are brought together, energy is transferred—i.e., heat flows—from the hotter body to the colder.
What is called sensible heat?
Sensible heat refers to heat you can feel, or sense. This is any heat which can be measured on a thermometer, whether it’s heat from the sun shining on a sunny day, or the flame from a candle. When an object is heated, the object’s increase in temperature is sensible heat.
What is meant by sensible heat?
Definition of sensible heat : thermal energy whose transfer to or from a substance results in a change of temperature — compare latent heat.
What is latent energy?
The latent heat of vaporization is the thermal energy required for a liquid to vaporize to a gas or the amount that is released when a gas condenses to a liquid. The latent heat of vaporization is also referred to as the enthalpy of vaporization.
What is the symbol for specific latent heat?
L = specific latent heat, in joules per kilogram (J/kg)