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Latent Heat Formula
The amount of heat needed to change a solid into a liquid or vapor phase or a liquid into vapor phase is known as latent heat. It goes under various names, such as the heat of condensation, the heat of vaporization, etc., depending on the various stages. The Latent Heat Formula is the quantity of heat energy that is either absorbed or released during a phase shift.
Phase transformations involve the presence of heat. The heat needed to change a solid into a liquid or vapor phase is referred to as latent heat. It goes under various names, such as the heat of condensation, the heat of vaporization, etc., depending on its phase. The quantity of heat energy that is received or released during a phase change might also play a role. This article shall discuss the idea of latent heat and the Latent Heat Formula using examples.
Latent Heat Formula
It takes more than just turning on the burner to get the water to boil. The temperature of the water rises as one applies heat, reaching a maximum of 100 degrees Celsius. Until all of the water turns from a liquid to a gas, the temperature of the water will remain constant.
Students will keep adding heat energy to the water during this process, but the temperature doesn’t rise. The idea of the Latent Heat Formula is a result of this additional energy.
Students should first go through the idea of phase shifts to help them comprehend. Phase change describes the transition of matter between two states. The distinct states of water exhibit the most frequent phase shifts. Examples include boiling liquid water to make a gas or freezing it to form ice. As students can see, heat significantly contributes to the transition of matter between phases.
Concept of Phase change:
When matter transitions from one state (solid, liquid, gas, or plasma), it goes through a phase shift. Both when the pressure on the system changes and when enough energy is added to (or taken away from) the system, these changes take place. Depending on the system’s chemical and physical characteristics, different temperatures and pressures are required for these changes to take place. The Latent Heat Formula is the name for the energy involved in these changes.
Definition of Latent Heat:
The temperature of an object often fluctuates as one adds or subtracts heat energy from it. The temperature of an object does not alter, however, when the phases shift. Due to the fact that changing phases of an item requires energy, this is the case.
In light of this, the Latent Heat Formula is the amount of heat per mass unit needed for a phase change to occur. Gaseous molecules will vibrate more than liquid molecules when one looks at the substances from a molecular perspective.
As a result, when one heats a liquid, they cause the molecules to vibrate. The energy needed to alter the motion of molecules will be provided by the Latent Heat Formula. There is a specific latent heat value for each substance.
The Formula for Latent Heat:
L = Q/M
Where,
Q = amount of heat
M = mass of the substance
According to this equation, heat Q must be added or subtracted in order for a mass m object to change phases. L stands for latent individual heat. Latent heat is measured in Jkg-1.
Latent heat has a changeable value. Depending on the type of phase transition occurs:
- The transformation of a liquid into a solid is known as the latent heat of fusion.
- From liquid to gas is the definition of latent heat of vaporization.
- The transition from a solid to a gas is known as the latent heat of sublimation.
Solved Examples
Each question must employ the Latent Heat Formula. It’s critical that students receive feedback on any inquiries they have about the Latent Heat Formula. Using NCERT solutions can allow students to quickly resolve any Latent Heat Formula issues. Since Extramarks is an online learning platform, getting NCERT solutions is simple. To ensure that the students comprehend the material completely, they must review the Latent Heat Formula. The Extramarks website and mobile app provide students with access to help with their Mathematics homework.