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Why is latent heat of vaporization of a material greater than that of latent heat of fusion?
Wiki User
∙ 8y ago
Heat is required both to melt and to vaporize a pure substance. During the phase change the potential energyof the substance is increasing (that's why the temperature doesn't change during a phase change). In going from solid to liquid, the bonds between the molecules or atoms of the substance are being loosened (from a crystalline structure with atoms or molecules in specific positions to a liquid in which the particles slide by each other). For liquid to gas changes, the bonds are completely broken. Breaking the bonds requires more energy per gram than loosening them. - Chem teacher Yahoo Answers
Wiki User
∙ 10y ago
Anonymous
Wiki User
∙ 15y agoEnthalpy of Vaporization is the amount of energy needed for a liquid to becomes gas. The specific number depends on the substance, but since going from a liquid to a gas breaks many more intermolecular bonds than going from a solid to a liquid, it requires much more energy.
Wiki User
∙ 15y agoVaporisation involves an increase in entropy, which in turn uses energy.
Wiki User
∙ 12y agomore energy is required to molecules of solid to change into vapours
Wiki User
∙ 12y agoNo, it is much, much lower.
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What is the latent of vaporization?
The latent heat of vaporization is what is commonly referred to as boiling. This is the amount of energy require to change from a state of liquid to vapor.
What is the electrical method to determine the specific latent heat of vaporisation?
coclude the specific latent heat of vaporization
What is the value of latent heat of vaporization of water?
2260 kJ/kg
What does the heat latent heat of vaporization measure?
The energy required to boil a substance
What is SI unit of latent heat of fusion?
The latent heat of fusion is defined as the heat energy required to convert a kg of a substance of liquid into solid of the same substance without a change of temperature. Q = mL where Q = Heat Energy in joules, m=mass of substance, L= Latent heat of fusion Taking units, [J] = [kg] [L] [L] = [J]/[kg] so units of latent heat of fusion are joules.kg-1
The amount of energy needed to change a material from a solid to a liquid is the heat of what?
The latent heat of evaporation
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
What information does the latent 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 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 difference between heat of fusion and heat of vaporization?
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.
What is the latent of vaporization?
The latent heat of vaporization is what is commonly referred to as boiling. This is the amount of energy require to change from a state of liquid to vapor.
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 is the amount of energy required to change a material from a liquid to a gas?
Latent Heat of Evaporation, or Evaporation Enthalpy. It is given in units of energy over unit of mass, i.e., KJ/Kg.
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 electrical method to determine the specific latent heat of vaporisation?
coclude the specific latent heat of vaporization
What is the relationship between energy and phase changes?
Adding or removing energy in the form of heat causes the phase change. The amount of heat to be added or removed is called latent heat. It changes the state of a substance without changing it's temperature. There are two types of latent heat. The latent heat of fusion, and the latent heat of vaporization. The latent heat of fusion must be added to change phase from solid to liquid, and removed to change from liquid to solid. The first change is endothermic and the second change is exothermic. The latent heat of vaporization must be added to change phase from liquid to vapor, and removed to change from vapor to liquid. Again the first change is endothermic and the second change is exothermic.
What is the Latent heat of vaporization for ethyl acetate?
87.6kcal/kg
