Latent heat is required to be input to turn a solid to a liquid, or a liquid to a gas, and the reverse is true the other way. Thus when water is evaporated to water vapor, a fixed amount of heat must be supplied per kg of water evaporated, and similarly when water vapor condenses, the same amount of heat per kg is released. You can look up values of latent heat per kg in reference tables for different substances.
Specific heat is not relevant to the phase change itself, as the phase change is isothermal (ie at a constant temperature). Specific heat is a way of defining for a substance how much heat is needed to change its temperature by one degree, relative to water which has a specific heat of 1, because we define the heat unit, calorie, as the heat required to raise 1 gram of water by 1 degC. Thus for other substances you take the specific heat (which will be quoted as a number relative to 1) and multiply by the change in temperature and the mass of substance to get the heat quantity in calories. Note that in SI units you will use kilograms rather than grams, the answer will then be in kilocalories which is a more useful quantity. In nutrition, when 'calories' are quoted, these are in fact kilocalories.
Latent heat is the energy required for 1 kg of a substance to change ___________. phase
the heat which is absorbed by a substance for changing solid into liquid state by keeping temperature constant is called latent heat of fusion while the heat which is evolved during phase change of liquid to vapour state at constant temperature is called latent heat of vapourization
The energy needed to completely vaporize a mole of a liquid
The heat energy needed to change a liquid to gas while the temperature stays the same is called the heat of vaporization. This energy is used to overcome the intermolecular forces holding the liquid molecules together and convert them into a gas. It is a phase change process that occurs at the boiling point of the substance.
Latent heat is the amount of thermal energy required to change the phase of a substance. Latent heat of fusion is the amount of energy needed to change it from a solid to liquid or a liquid to solid, and the latent heat of vaporization is the thermal energy needed to change from a liquid to gas or a gas to liquid. For example, in the equation Q = mL, Lfusion (latent heat of fusion) for water is 75.5 cal/gram. Lvaporization (latent heat of vaporization) for water is 539 cal/gram. Substances have different latent heats.
Latent heat is the energy required for 1 kg of a substance to change ___________. phase
The amount of energy required to turn a mole of a liquid into a gas
the heat which is absorbed by a substance for changing solid into liquid state by keeping temperature constant is called latent heat of fusion while the heat which is evolved during phase change of liquid to vapour state at constant temperature is called latent heat of vapourization
Latent heat of vapourisation can be define as the rate by which water is heat to vapourise, it has a difference with evaporation because evaporation occurs directly when the water start heatin while vapourisation always start in a specific temperature
Latent heat is the amount of energy that is needed to change the state of matter. Either from a solid to a liquid, from a liquid to gas or vice versa. For example if you boil a kettle of water, energy or latent heat is added to the water from the element within the kettle. The water will heat up and eventually turn to steam.
It is the latent heat of liquefaction.
The energy needed to change a substance from a liquid to a gas is called the enthalpy (or heat) of vaporization.
The latent heat of fusion is the amount of heat energy needed to change a substance from a solid to a liquid at its melting point. It is a characteristic property of each substance and is usually expressed in joules per gram.
The amount of heat required to melt one kilogram of a substance is known as the heat of fusion or the latent heat of fusion. It represents the energy needed to change a solid into a liquid at its melting point without a change in temperature.
Latent heat of fusion is the energy required to change a substance from solid to liquid at its melting point, without changing its temperature. It represents the energy needed for the molecules to break free from their fixed positions in a solid structure.
Latent heat is the measurement of energy needed to change the state of a substance at its melting point or boiling point. The latent heat of fusion of water is the amount of energy needed to change a fixed amount of water from a solid to liquid at 0 degrees C. this works out to be more than 800KJ of heat energy. The latent heat of vaporization of water is the amount of energy needed to change a fixed amount of water from a liquid to a gas at 100 degrees C. this is more than 1200KJ of heat needed to be absorbed.
The amount of heat released / absorbed from a substance at constant temperature as you change state from liquid->solid / solid->liquid.