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What is the unit for latent heat?

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What is latent heat of vaporization?

Latent heat of vaporization is a physical property of a substance. It is defined as the heat required to change one mole of liquid at its boiling point under standard atmospheric pressure. It is expressed as kg/mol or kJ/kg. … The heat of vaporization of water is about 2,260 kJ/kg, which is equal to 40.

Is latent heat of fusion?

Overview. The ‘enthalpy’ of fusion is a latent heat, because during melting the heat energy needed to change the substance from solid to liquid at atmospheric pressure is latent heat of fusion, as the temperature remains constant during the process. … The liquid phase has a higher internal energy than the solid phase.

What are three types of latent heat?

There are three different types of latent heats,

  • Latent Heat of Fusion,
  • Latent Heat of Vaporization,
  • Latent Heat of Sublimation.

What is another name of latent heat?

Latent heat (also known as latent energy or heat of transformation) is energy released or absorbed, by a body or a thermodynamic system, during a constant-temperature process — usually a first-order phase transition.

What is Latent Heat Class 9?

The term latent heat of vaporisation can be defined as the amount of heat needed for the conversion of 1kg of liquid at its boiling point to gas at same temperature. It differs among different liquids. Particles of water vapour at 100oC (373K) have more energy than liquid water at same temperature.

How do you calculate latent heat?

Latent heat calculation The specific latent heat is different for solid to liquid transition and liquid to gas transition. For example, if we want to turn 20 g of ice into water we need Q = 20 g * 334 kJ/kg = 6680 J of energy. To turn the same amount of water into vapor we need Q = 45294 J ./span>

What is specific latent heat?

Specific latent heat is the amount of energy required to change the state of 1 kilogram (kg) of a material without changing its temperature. … latent heat of vaporisation – the amount of energy needed to boil or condense the material at its boiling point.

What are the two types of specific latent heat?

Each substance has two specific latent heats:

  • latent heat of fusion (the amount of energy needed to freeze or melt the substance at its melting point)
  • latent heat of vaporisation (the amount of energy needed to evaporate or condense the substance at its boiling point)

What is specific latent heat of fusion?

Specific latent heat of fusion, lf, of a substance is defined as the amount of heat required to change a unit mass of the substance from solid to liquid state, without any change in the temperature./span>

What is the difference between latent heat and specific heat capacity?

Hi Shrawani Latent heat capacity is the heat required by a substance without the change in temperature. Specific heat capacity is the heat required by a substance of unit mass to change the temperature by 1 degree C./span>

How do you calculate latent heat of fusion?

Eh means energy, equals m for mass, times l. l is the specific latent heat of fusion for that material. So the formula tells us how much heat energy is needed to go into a material to change it from a solid to a melted liquid. If you apply heat to ice, it will melt.

What is the latent heat of fusion of ice?

The value of latent heat of fusion of ice is 80 cal/g.

What is CP of water?

The specific heat capacity often varies with temperature, and is different for each state of matter. Liquid water has one of the highest specific heats among common substances, about 4182 J/(K kg) at 20 °C; but that of ice just below 0 °C is only 2093 J/(K kg).

What is Q MCP ∆ T?

Q = mc∆T. Q = heat energy (Joules, J) m = mass of a substance (kg) c = specific heat (units J/kg∙K) is a symbol meaning “the change in”

What is CP and CV?

So, Cp represents the molar heat capacity, C when pressure is constant. … In other words, Cv is the heat energy transfer between a system and its surrounding without any change in the volume of that system. Cv represents the molar heat capacity C when volume is constant.

Is CP a CV?

Cp is greater than the molar specific heat at constant volume Cv because energy must now be supplied not only to raise the temperature of the gas but also for the gas to do work. … More heat would be required at constant pressure to cause the same temperature rise and Cp will be greater than Cv.

What is CV for ideal gas?

The molar specific heat capacity of a gas at constant volume (Cv) is the amount of heat required to raise the temperature of 1 mol of the gas by 1 °C at the constant volume. Its value for monatomic ideal gas is 3R/2 and the value for diatomic ideal gas is 5R/2./span>

What is CP CV ratio?

Cp/Cv ratio is defined as the ratio of two specific heat capacities. (i.e.) Heat Capacity ratio = Cp/Cv = Heat capacity at constant pressure/ Heat capacity at constant volume.

What is K in specific heat?

The specific heat ratio of a gas (symbolized as gamma “γ” but also known as “k”) is commonly defined as the ratio of the specific heat of the gas at a constant pressure to its specific heat at a constant volume (see Equation 1).

What is r in thermodynamics?

The ideal gas law is: pV = nRT, where n is the number of moles, and R is universal gas constant. The value of R depends on the units involved, but is usually stated with S.I. units as: R = 8.

What is Gamma for CO2?

. For linear polyatomic gases (such as CO2 or N2O ): γ≈1.