What is latent heat?

What is 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. 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 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.

Why it is called latent heat?

Latent heat, also called heat of transformation, is the heat given up or absorbed by a unit mass of a substance as it changes from a solid to a liquid, from a liquid to a gas, or the reverse of either of these changes. It is called latent because it is not associated with a change in temperature.

What is latent heat and specific heat?

Latent heat is the energy absorbed or released when a substance is undergoing a phase change. Specific heat is the quantity of heat required to raise the temperature of one gram of a substance by one degree Celsius (or one Kelvin) at a constant pressure.

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.

Why do we use 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.

What is latent heat in plumbing?

The heat added to keep the water boiling is latent heat. Heat that causes a change of state with no change in temperature is called latent heat.

What is latent heat Class 9 Chemistry?

The heat energy which has to be supplied to change the state of a substance is called latent heat. Latent heat does not raise the temperature.

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.

How does latent heat actually work?

Latent heat arises from the work required to overcome the forces that hold together atoms or molecules in a material. The regular structure of a crystalline solid is maintained by forces of attraction among its individual atoms, which oscillate slightly about their average positions in the crystal lattice.

How do you calculate latent heat?

HEAT ABSORBED = MASS (kg) x SPECIFIC HEAT x TEMPERATURE CHANGE To calculate the heat absorbed during a change of state use: HEAT ABSORBED = MASS (kg) x LATENT HEAT For example: Water leaves a hose at 20oC and is converted by the heat from the fire into steam at 300oC.

What is the difference between sensible heat and latent 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 the sensible heat is defined for a system that has no change in the phase of matter.