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The critical pressure at which the latent heat of vaporization for water is zero is?
Wiki User
∙ 11y ago
Its the temp AND pressure at which there is no difference between the liquid water and the vapor (steam)
for water that is -
around 647 K (374 °C; 705 °F) and 22.064 MPa (3200 PSIA or 218 atm)
Wiki User
∙ 11y ago
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Why is water considered as high specific heat and latent heat of vaporization?
The latent heat of vaporization of a liquid is the amount of heat needed to change that liquid when at it's boiling point to a gas. Hydrogen bonds are present between water molecules. These are strong intermolecular forces between the slightly negative oxygen atom in one water molecule and the slightly positive hydrogen atom in another water molecule. These bonds must be broken in order for the water to change from a liquid to a gas and requires a great amount of energy thus explaining water's high latent heat of vaporization.
When trees transpire releasing gaseous water into the atmosphere they can absorb heat from their environment and cool it down. What property of water is responsible for this activity?
Latent heat of vaporization.
Amount of heat necessary to change the state of substance?
Heat of vaporization or enthalpy of vaporization. It is the additional energy, per unit mass, required after vaporization temperature (boiling point) is reached, to accomplish the change in state, from liquid to gas.
What information does the latent heat of fusion give?
latent heat of fusion tells us about the amount of energy that must be taken off from water at 00C to fuse it into ice at 00C . Actually this in this phase temperature remains constant and this energy is (either latent heat of fusion or latent heat of vaporization is the potential energy which is possessed by the states by their virtue.
What is the latent heat of fusion of water at atmospheric pressure?
80 cals per gram
What step changes liquid water to water vapor?
Vaporization is the change of liquid water to water vapor. Vaporization requires addition of the latent heat of vaporization to liquid water. The latent heat of vaporization supplies the liquid water molecules with enough energy to become vapor molecules. The latent heat of vaporization at 1.0 atmosphere pressure is about 1000 Btu per lbm ( 2260 kJ per kg ).
What is the value of latent heat of vaporization of water?
2260 kJ/kg
How your body cooled when you perspire?
Perspiration coats the outside of the skin with moisture (water). The water evaporates. Evaporation requires heat to be absorbed by the water (the latent heat of vaporization). Heat is removed from the body surface to provide the water with the latent heat of vaporization.
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 the purpose of the water trap in determining the latent heat of vaporization of water?
to prevent water from entering the calorimeter and allow only the gas.
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..
Why is water considered as high specific heat and latent heat of vaporization?
The latent heat of vaporization of a liquid is the amount of heat needed to change that liquid when at it's boiling point to a gas. Hydrogen bonds are present between water molecules. These are strong intermolecular forces between the slightly negative oxygen atom in one water molecule and the slightly positive hydrogen atom in another water molecule. These bonds must be broken in order for the water to change from a liquid to a gas and requires a great amount of energy thus explaining water's high latent heat of vaporization.
How many btu's we add to one 15 pounds of water at 212 Fahrenheit to make steam at 212 Fahrenheit?
The latent heat of vaporization of water at 212 degrees Fahrenheit at atmospheric pressure involving only vaporization and no saturation is 970 BTU/lb, so to evaporate 15 lbs of water we need 970 x 15 = 14550 BTU's
Are swamp coolers effective?
the water's latent heat of vaporization is being pulled from the air, the water pulls heat from the room to undergo a phase change.
What is the explanation for the working of a benson boiler?
Benson Boiler is a water tube high pressure boiler having forced circulation. It works on the principle that if the boiler pressure is raised to critical pressure (225 kg/cm^2) then there is no formation of steam bubbles Because the steam and water at this pressure will have the same Density. To achieve this water is fed to the boiler at critical pressure . At this pressure water will be directly converted to superheated steam as the latent heat at critical pressure is zero. Overall efficiency of plant is decreased as a lot of energy is consumed by feed water. Operating the boiler at a slightly lower pressure than the critical pressure efficiency can be increased. Thermal efficiency upto 90% can be achieved.
Which biological process uses the latent heat vaporization of water?
i think d...................... what you mean
How your body is cooled when you perspired?
When your body perspires, it is coating your body with sweat. When it is really hot out, the sweat evaporates, cooling your body by removing the sweat.
