What Is Latent Heat?

What is Latent Heat Class 9?

The latent heat of fusion or melting of solid is the quantity of heat in joules required to convert 1 kg of solid to liquid,without any change in temperature.

The heat which is going into ice but not increasing its temperature,is the energy required to change the state of ice from solid to liquid..

What is Latent Heat formula?

The amount of heat energy absorbed or released for a phase change is known as latent heat. The latent heat formula is given by, L = Q / M. Where, Q = amount of heat.

What is latent heat in HVAC?

Latent heat is the heat the results from an increase or decrease in the amount of moisture held by the air. Specifically, it’s the amount of energy needed to cause a phase change (for our purposes, liquid-to-gas or gas-to-liquid) without changing the actual temperature of a substance.

What is the latent heat of steam?

As the latent heat of steam at atmospheric pressure is 2257 kJ/kg the amount of flash steam produced will be 299/2257 = 0.133 kg/kg of condensate.

What is Class 9 boiling point?

NCERT Class 9 Science Lab Manual – Melting Point of Ice and Boiling Point of Water. … Boiling Point: The temperature at which the liquid boils and changes into gaseous state at the atmospheric pressure is called boiling point. For example, water boils at 100°C to form water vapour (at 76 cm 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.

What is latent heat of melting?

Latent heat is a form of internal or potential energy stored by evaporated or melted water. … A total of 334 J of energy are required to melt 1 g of ice at 0°C, which is called the latent heat of melting. At 0°C, liquid water has 334 J g−1 more energy than ice at the same temperature.

What is Latent Heat and why is it important?

That is latent heat. When the molecules return to a liquid state the latent heat is released as sensible heat (heat you can feel basically). It is important in the atmosphere because it is the primary factor involved in the formation of convective clouds and the stability/instability of the atmosphere.

What is the difference between heat and latent heat?

Specific heat is the amount of heat required to raise the temperature of a substance a certain amount. Latent heat is the amount of heat released during a change of state, i.e. the boiling of water or the melting of ice.

Why is latent heat hidden?

Latent heat is sometimes called the ‘hidden’ or ‘stored’ heat used to change the state of a substance without a change in temperature. … The temperature does not increase as the water (liquid) starts to evaporate and become water vapour (a gas).

Why is latent heat important?

Latent heat is an important source of energy in the development of thunderstorms and hurricanes. Water vapor strongly absorbs infrared radiation, making it an important gas in the Earth’s heat-energy balance. In fact water vapor is the largest contributor to the greenhouse effect on Earth.

How do you get latent heat?

Latent Heat Of Fusion FormulaL = specific latent heat of fusion of substance.The total amount of heat absorbed or liberated by the material is.Let c be the specific heat of the metal.Heat gained by the metal.Q = 60 × c × (100 – 20)Q = 60 × c × 80 cal.Heat given is equal to Heat taken.0.5 × 540 = 60 × c ×80.

Can latent heat negative?

Both latent and sensible heat fluxes are negative because the ground is cooling and water vapor is condensing, leading to a positive gradient in temperature and specific humidity.

How do you calculate latent heat from mass?

Q = m * L ,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 in simple words?

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.

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 are the two 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 are the applications of latent heat?

The application of LHTES in buildings has the following advantages: (1) the ability to narrow the gap between the peak and off-peak loads of electricity demand; (2) the ability to save operative fees by shifting the electrical consumption from peak periods to off-peak periods since the cost of electricity at night is 1 …