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What is the Latent heat of vapourization at low pressure and temperature?
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How does specific latent heat of water vary with temperature?
Latent heat of water is the heat required to change its state at a particular temperature BECAUSE of the pressure at which the water is at at the point of fusion or evaporation.The latent heat is not affected by temperature (in fact there is no temperature change during absorption of latent heat) it is affected by the pressure acting on a substance. As the pressure increases, the latent heat (of evaporation) decreases, consequently with the change in pressure there is also a different temperature at which the evaporation takes effect, higher pressure, higher temperature at the evaporation point.
Latent heat of vaporisation decreases as pressure increases and becomes zoro at critical pressure i read . why it so?
As pressure increases the temperature required to vaporize water is less. So with increase in pressure there is decrease in temperature required to boil so latent heat also decreases.
What is a latent heat energy levels?
Latent heat- the amount of heat required by a system/ substance to change phase. It's also heat absorbed or radiated during a change of phase at a constant temperature and pressure.
Energetically what must be done or what must happen before water can boil?
The water must absorb sufficient heat energy to raise its temperature to the boiling point PLUS the Latent Heat of Vaporization at that Temperature and Ambient Pressure..
What type of energy is absorbed or released when a substance changes phase?
pChanges in bonding arrangements between atoms and molecules result in absorption or release of heat (called latent heat). For example when water freezes, some heat is extracted to the environment, and the temperature does not fall until all is frozen. After that further removal of heat causes the temperature to fall below freezing point.
What is the difference between latent heat of fusion and latent heat of vapourization?
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
How does specific latent heat of water vary with temperature?
Latent heat of water is the heat required to change its state at a particular temperature BECAUSE of the pressure at which the water is at at the point of fusion or evaporation.The latent heat is not affected by temperature (in fact there is no temperature change during absorption of latent heat) it is affected by the pressure acting on a substance. As the pressure increases, the latent heat (of evaporation) decreases, consequently with the change in pressure there is also a different temperature at which the evaporation takes effect, higher pressure, higher temperature at the evaporation point.
Latent heat energy levels?
The latent heat energy levels refers to the heat absorbed during a change phase at a constant pressure and temperature.
Latent heat of vaporisation decreases as pressure increases and becomes zoro at critical pressure i read . why it so?
As pressure increases the temperature required to vaporize water is less. So with increase in pressure there is decrease in temperature required to boil so latent heat also decreases.
Why is the latent heat of vapourization of steam is more than that of boiling water?
Because steam is hotter than boiling water.
What will happen to the temperature of a pot of boiling water as the water evaporates?
As water evaporates from the boiling pot,its temperature drops.This results from the fact that water molecules during evaporation extract its latent heat of vapourization from the pot, thereby exerting a cooling effect on it and its content.Regulation of body temperature by sweating is based on this principle. When sweat comes out of its pores, usually in suny days, it evaporates and in the process extract its latent heat of vapourization from the body.This causes the body temperature to decrease.In this way it keeps the body temperature fairly constant.
For one mole of any substance at its boiling point the difference in the enthalpy of its vapor is what?
The change in enthalpy is dH = TdS + VdP. Since the pressure P is the same for the the vapor and the liquid, the change in enthalpy is just TdS, which is just the latent heat.
Why is heat of fusion called the latent heat of fusion?
It is called latent because heat is supplied without any increase in temperature.
Definition of refrigeration?
The transfer of heat from one space to another. Usually using latent heat evaporation in the evaporator coil, rejecting it in the latent heat of condensation in the condensor coil, using the compressor to pump the refrigerant and the metering device to cause a pressure and therefore temperature drop.
What is a latent heat energy levels?
Latent heat- the amount of heat required by a system/ substance to change phase. It's also heat absorbed or radiated during a change of phase at a constant temperature and pressure.
Why is latent heat of vapourisation higher than latent heat of fusion?
latent heat of vapourisation is the heat energy required to change 1 kg of a liquid to gas at atmospheric pressure at its boiling point where latent heat of fusion is the amount of heat energy required to change 1 kg of solid to liquid at its melting point so that is why latent heat of vapourisation higher than latent heat of fusion.
Define latent heat of fusion and latent heat of vapourisation?
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
