The process of transmission of this type of heat
Posted: Thu Dec 12, 2024 9:24 am
Latent heat is a fundamental concept for understanding how a substance changes from one state to another, and how that influences the energy process of the substance. In this article, we explain what the so-called heat of change of state consists of, how it differs from sensible heat, and why it is important.
What is latent heat?
First of all, we are going to explain what we mean when we talk about latent heat. It is the energy that a substance absorbs when it changes from one state to another.
When a material or substance changes state, list of yemen consumer email an absorption or a transfer of latent heat occurs. Thus, when a liquid changes to a gaseous state, it absorbs this type of heat. In the same way, when a gas condenses and changes to a liquid state, it gives off latent heat. The key to distinguishing latent heat is that, while these processes occur, there are no changes in temperature.
In this sense, it is important to be clear that, when a system absorbs or gives off a certain amount of heat, two things can happen:
There is a change in its temperature, in which case we would talk about sensible heat.
It only changes phase without changing its temperature, that is, latent heat.
Types of latent heat
Now that you know what heat of state change is, and that it manifests itself in any phase change process, let's see what the types of phase change are:
Vaporization: transformation from liquid to gas.
Fusion: change from solid to liquid.
Solidification: process from liquid to solid.
Sublimation: change from solid to gas.
Condensation: change from gas to liquid.
At this point it is important to clarify the difference between two key concepts. When a change from solid to liquid state occurs, we speak of latent heat of fusion. On the other hand, if the state changes from liquid to gaseous, we speak of latent heat of vaporization of water.
Furthermore, the latent heat of fusion and vaporization is not the same for all substances. Each has its own molecular characteristics, which directly influences its heat of change of state.
The formula that allows us to calculate the amount of heat needed to change The state of the substance is as follows:
Q=mL,
"m" being the mass of the substance that changes state, and "L" being the latent heat of said substance. The latter depends on the type of phase change.
If heat is delivered in the form of sensible heat to a certain mass of substance whose temperature is lower than its freezing point, it will remain in a solid state until its temperature reaches the melting point.
In this melting process, the product remains at a constant temperature and begins to melt, carrying out a heat transfer process.
What is latent heat?
First of all, we are going to explain what we mean when we talk about latent heat. It is the energy that a substance absorbs when it changes from one state to another.
When a material or substance changes state, list of yemen consumer email an absorption or a transfer of latent heat occurs. Thus, when a liquid changes to a gaseous state, it absorbs this type of heat. In the same way, when a gas condenses and changes to a liquid state, it gives off latent heat. The key to distinguishing latent heat is that, while these processes occur, there are no changes in temperature.
In this sense, it is important to be clear that, when a system absorbs or gives off a certain amount of heat, two things can happen:
There is a change in its temperature, in which case we would talk about sensible heat.
It only changes phase without changing its temperature, that is, latent heat.
Types of latent heat
Now that you know what heat of state change is, and that it manifests itself in any phase change process, let's see what the types of phase change are:
Vaporization: transformation from liquid to gas.
Fusion: change from solid to liquid.
Solidification: process from liquid to solid.
Sublimation: change from solid to gas.
Condensation: change from gas to liquid.
At this point it is important to clarify the difference between two key concepts. When a change from solid to liquid state occurs, we speak of latent heat of fusion. On the other hand, if the state changes from liquid to gaseous, we speak of latent heat of vaporization of water.
Furthermore, the latent heat of fusion and vaporization is not the same for all substances. Each has its own molecular characteristics, which directly influences its heat of change of state.
The formula that allows us to calculate the amount of heat needed to change The state of the substance is as follows:
Q=mL,
"m" being the mass of the substance that changes state, and "L" being the latent heat of said substance. The latter depends on the type of phase change.
If heat is delivered in the form of sensible heat to a certain mass of substance whose temperature is lower than its freezing point, it will remain in a solid state until its temperature reaches the melting point.
In this melting process, the product remains at a constant temperature and begins to melt, carrying out a heat transfer process.