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The specific latent heat of ice and water is not the same. The specific latent heat of fusion for ice (the heat required to convert ice to water at 0°C) is approximately 334 kJ/kg, while the specific latent heat of vaporization for water (the heat required to convert water to vapor at 100°C) is significantly higher, around 2260 kJ/kg. Thus, the energy required for phase changes differs between ice and water.
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What is the value of latent heat of vaporization of water?
The latent heat of vaporization of water is approximately 2260 kJ/kg at standard atmospheric pressure and temperature. This is the amount of energy required to change 1 kg of liquid water at its boiling point into steam at the same temperature.
What is the difference between the latent heat of water and the latent heat of evaporation of water?
Latent heat means the inherent, hidden heat. When we place a vessel of water on a burning stove having a thermometer within, initially the temperature level would rise in the thermometer because heat is taken up by water from the stove. But when the temperature becomes nearly 100oC the temperature would remain at the same level. Do you say that heat is not taken by the water from the flame of the stove? Certainly not. Then why is it so? Here, a new phenomenon starts taking place. Every unit (say 1 kg) of water starts getting converted from liquid form into gas form, that is, steam. So heat is totally utilized for that change of state. Hence the level of the thermometer stands still. This amount of heat sole utilized to have this change of state is called latent heat of steam. This means all heat drawn from the stove is available as inherent heat within steam. When steam condenses back into water, the hidden heat would come out. Same way, you can think about giving heat to ice. If suppose the initial temperature of the ice is some -10oC, then temperature would rise up to 0oC and there after though heat is continuously passed on to the ice solid, the temperature will come to stand still. Now, the heat is used to melt every unit of ice into its liquid form (water). This heat is termed as latent heat of melting. Or even we say this as latent heat of fusion. The above two are the examples of the change of state. From liquid to gas and from solid to liquid. Apart from these, water would be changed into water vapour even at the room temperature. This phenomenon is due to the shooting off the water molecules right from the water medium into the atmosphere (air medium). But, you cannot see any fall in temperature due to this escape. Here molecules gain energy from the surroundings and hence molecules could come out so without making any change in its temperature. This is termed as latent heat of vapourisation. (this would be better instead evaporation)
What is the dfference between specific heat and latent heat?
Specific Heat mans the amount of heat required to raise the temperature of a substance by a certain amount (or of course the heat it releases in cooling the same amount). It can be expressed in various units, depending which is suitable for the case being studied. Thus scientists usually use grams weight, degrees Celsius, and calories for the heat. So specific heat would be expressed as calories per gram per degree Celsius. Engineers probably prefer larger units, ie kilograms and kilocalories, or in the USA they may still use the traditional old British units, ie pounds weight and degrees Fahrenheit, and heat may be in BTU. Specific heat is relative to water, ie one calorie is the heat to raise one gram of water one degree Celsius, and one BTU similarly, one pound of water one degree Fahrenheit. Latent heat is quite a different matter. This is the heat released in a Change of State, ie steam to water for example, or in reverse the heat required to evaporate water which is already at boiling point into water vapour. It also appears in many other substances during a change of state, for example when liquid wax solidifies, the latent heat is released. In quantity, this would be expressed as so many calories per gram, or whatever combination of units is preferred.
How are specific heat of water and ice the same?
That is how specific heat is defined. When you measure something you have to measure it relative to some point of reference. In specific heat it was agreed upon that water was to be the standard and its specific heat would be one. Therefore everything else is measured relative to water.
How much energy is transfered when 1gm of boiling water at 100c condenses to water at 100c?
When 1 gram of boiling water at 100°C condenses to water at the same temperature, it releases energy in the form of latent heat of vaporization. The latent heat of vaporization for water is approximately 2260 joules per gram. Therefore, when 1 gram of steam condenses, about 2260 joules of energy is transferred to the surroundings.
What is the specific latent heat of fusion of mercury?
The specific latent heat of fusion of mercury is about 11.28 kJ/kg. This value represents the amount of energy required to change a unit mass of solid mercury at its melting point to liquid mercury at the same temperature, without changing its temperature.
What are the factors that affect specific latent heat of fusion of a substance?
The amount of energy needed to change the "state of matter" is termed as "latent heat". This is not same for vapourisation (liquid to vapour) or for fusion (solid to liquid). For example, latent of fusion is 79.7 cal whereas latent heat for vapourisation is 541 calories. The latent depends on how closely the atoms and molecules in the matter are closely packed.
Why in ice cube at 0 degree Celsius is much effective in cooling a drink that the same mass of water at 0 degree Celsius what is the formula?
Latent heat of the ice, liquid water has no latent heat reserves. Perhaps at freezing we should call it "latent cold" but thermodynamics has always referred to it as latent heat whether at boiling or freezing. +++ It is latent heat because the water (liquid or ice) at freezing-point (0ºC) still contains heat energy as its temperature is at about 217ºK.
What is the value of latent heat of vaporization of water?
The latent heat of vaporization of water is approximately 2260 kJ/kg at standard atmospheric pressure and temperature. This is the amount of energy required to change 1 kg of liquid water at its boiling point into steam at the same temperature.
What does specific latent heat of melting mean?
Specific latent heat of melting is the amount of heat energy required to change 1 kg of a substance from solid to liquid at its melting point without a change in temperature. It represents the energy needed for the phase change to occur, breaking intermolecular bonds to allow particles to move more freely.
Which freezes fastest water with salt sugar or roCk?
All are essentially the same latent heat .... energy per unit of mass.
Q - What is the difference between latent heat of fusion and latent heat of solidfication?
They are the same thing. Fusion and solidification both mean the changing of a liquid to a solid.
Which contains more heat energy water at 373K or steam at 373K Why?
Steam at 373K contains more heat energy than water at 373K because it has undergone a phase change from liquid to gas, requiring additional energy (latent heat of vaporization). This extra energy contributes to the higher heat content of steam compared to water at the same temperature.
What is the difference between latent heat and heat?
Usually as we give heat to a system then temperature of the system would rise. But at the boiling point though we give enormous amount of heat the temperature would remain the same and so the heat given is said to be latent and it is used to change water from liquid state to gaseous state. Hence the name latent heat
What is the difference between the latent heat of water and the latent heat of evaporation of water?
Latent heat means the inherent, hidden heat. When we place a vessel of water on a burning stove having a thermometer within, initially the temperature level would rise in the thermometer because heat is taken up by water from the stove. But when the temperature becomes nearly 100oC the temperature would remain at the same level. Do you say that heat is not taken by the water from the flame of the stove? Certainly not. Then why is it so? Here, a new phenomenon starts taking place. Every unit (say 1 kg) of water starts getting converted from liquid form into gas form, that is, steam. So heat is totally utilized for that change of state. Hence the level of the thermometer stands still. This amount of heat sole utilized to have this change of state is called latent heat of steam. This means all heat drawn from the stove is available as inherent heat within steam. When steam condenses back into water, the hidden heat would come out. Same way, you can think about giving heat to ice. If suppose the initial temperature of the ice is some -10oC, then temperature would rise up to 0oC and there after though heat is continuously passed on to the ice solid, the temperature will come to stand still. Now, the heat is used to melt every unit of ice into its liquid form (water). This heat is termed as latent heat of melting. Or even we say this as latent heat of fusion. The above two are the examples of the change of state. From liquid to gas and from solid to liquid. Apart from these, water would be changed into water vapour even at the room temperature. This phenomenon is due to the shooting off the water molecules right from the water medium into the atmosphere (air medium). But, you cannot see any fall in temperature due to this escape. Here molecules gain energy from the surroundings and hence molecules could come out so without making any change in its temperature. This is termed as latent heat of vapourisation. (this would be better instead evaporation)
What is the dfference between specific heat and latent heat?
Specific Heat mans the amount of heat required to raise the temperature of a substance by a certain amount (or of course the heat it releases in cooling the same amount). It can be expressed in various units, depending which is suitable for the case being studied. Thus scientists usually use grams weight, degrees Celsius, and calories for the heat. So specific heat would be expressed as calories per gram per degree Celsius. Engineers probably prefer larger units, ie kilograms and kilocalories, or in the USA they may still use the traditional old British units, ie pounds weight and degrees Fahrenheit, and heat may be in BTU. Specific heat is relative to water, ie one calorie is the heat to raise one gram of water one degree Celsius, and one BTU similarly, one pound of water one degree Fahrenheit. Latent heat is quite a different matter. This is the heat released in a Change of State, ie steam to water for example, or in reverse the heat required to evaporate water which is already at boiling point into water vapour. It also appears in many other substances during a change of state, for example when liquid wax solidifies, the latent heat is released. In quantity, this would be expressed as so many calories per gram, or whatever combination of units is preferred.
Why does vinegar freeze faster than water?
Vinegar has a lower freezing point than water because it contains acetic acid, which lowers the freezing point of the solution. This can result in vinegar freezing faster than water when both are exposed to the same temperature.
