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There are two reasons. One is that water molecules are able to form four hydrogen bonds each. This is a lot for a very small molecule. The more hydrogen bonds it has, the more energy (heat) it takes to strip it from its neighbours. The other (lesser) reason is that the difference in density between liquid water and steam vapour is huge compared with most substances, which means that as it vaporizes it must push against atmospheric pressure, to evolve (atmospheric pressure is trying to keep it confined as a liquid - this is why water boils at 68 degC (IIRC) on top of Everest (less resistance from atmospheric pressure)).
But really it is the hydrogen bonds, mostly. Which is also why water has an enormous surface tension....
Wiki User
∙ 12y ago
Wiki User
∙ 11y agoThe heat (enthalpy) of vaporization for water is defined as the heat per unit mass required to convert liquid water at its boiling point to gaseous water at the same temperature. For any given mass unit, the value for water is higher than that for almost any other liquid, because of the strong hydrogen bonding of water in liquid.
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What materials have high latent heat capacity?
water
What is the tendency of water to resist temperature change?
High specific heat of water due to it's polarity. Many hydrogen bonds are forming and reforming constantly so that energy added to water has more difficulty breaking these bonds and this resists temperature change in the upward direction.
Why is energy require for melting or boiling process?
Energy is required in the melting process because high is needed to melt something
The temperature of a large body of water stays about the same both day and night because?
Because water has a high specific heat content (~4200 J/kg/K ) which means it takes a lot of changes in heat (i.e. energy flux, whether it's heating from the sun, or lost of heat through latent heat flux, sensible heat flux etc) to get a degree of temperature change
Water has a high latent heat capacity This means that?
They require alot more heat before their temperature start to rise, while others require less. These latter materials then takes much longer to cool down because they have more heat energy to give off.
What materials have high latent heat capacity?
water
What are the factors that cause breezes to occur?
The high latent heat of water.
What are the factor that cause sea breeze to occur?
The high latent heat of water.
What accounts for stabilizing effects of Earth's ocean?
The high latent heat of water.
Explain why water is used in hot water bottle for fomentation?
bcoz water has high latent heat
What is the difference of heat and heat capacity?
Heat capacity is the amount of heat something can take before it changes temperature by a degree. If we use water as an example, it is said to have a high heat capacity as you need to heat it a lot before it changes temperature at all. Latent means not yet existing. Latent heat is therefore referring to the amount of heat it would take something for it to change state. Water is said to have a high latent heat of vaporisation. That means that it takes a lot of heat to vaporise water. While heat capacity talks about how much heat something can take, latent heat talks about how much heat something requires to cause a change. Similar concepts but they have slight differences.
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.
Does a steam trap remove condensate?
water receives heat to become vapour thus carrying energy . water is mainly used because it is plentiful and has very high latent heat of vapourisation which absorbs a hell lot of heat during evaporation. here heat energy is converted into pressure energy during heating formation of steam and then expanded in turbines or let out to get kinetic energy as the output.
Why does the temperature stops rising during melting and boiling point?
Because the latent heat of fusion and latent heat of vaporization are very high
Why is water used for fomentation?
i think because it's latent heat is high and it is cheap compared to other liquids, easily available as well.
What is the difference of heat capacity and latent heat?
Specific heat capacity (equation Q=mc��T) is the measure of the energy required in Joules to raise 1kg of a substance by 1.0 K (numerically equivalent to 1 C)Whereas, specific latent heat (equation Q=mL) is the amount of energy needed to change to the state of a substance either from solid to liquid, liquid to gas without changing its temperature.
Why does water have a high latent heat?
This is because of its polar nature - water molecules have a strong dipole, therefore, the water molecules attract each other more than most other molecules do.
