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When are the quantites molar enthalpies of fusion and molar enthalpy of vaporation used?
Wiki User
∙ 11y ago
Fusion refers to the phase change from liquid to solid (or vv) and vaporization refers to the phase change from liquid to gas (or vv). Heat is either absorbed or released from the substance when these events occur.
We use the molar enthalpies to calculat exactly how much heat is transferred during these processes.
Ex .. If we are to boil (vaporize) 3 moles of some substance with a known molar enthalpy of vaporization of 120 KJ/mole then we multiply.
3 moles x 120 KJ/mole = 360 KJ of energy is needed for the vaporization to take place.
Wiki User
∙ 11y ago
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Is enthalpy of fusion a chemical property?
A physical property
The energy required to melt one gram of a substance is known as what?
heat of fusion
What specific heat is the energy used to evaporate water or melt snow?
The first is called enthalpy of vaporization, the second is called enthalpy of fusion.
How many calories are required at 0 degree Celsius to melt an ice cube with a mass of g?
What you need is the enthalpy of fusion for ice and simply multiply it by your mass. An online search shows that the enthalpy of fusion for ice is: 79.72 cal/g So calories needed to melt all your ice is just. Energy = 79.72cal/g x 25g = 242.50 calories
What chemical bond possess low latent heat of fusion?
Latent heat of fusion (or enthalpy of fusion) is a characteristic of a substance, rather than a chemical bond. If you mean enthalpy of reaction then the lowest absolute values are for the bonds in H2, F2, and Cl2 as gases, which are zero. One low (and negative) value is for cuprous sulphate. Please see the link.
Why is the enthalpy of sublimation is equal to the sum of enthalpy of fusion and enthalpy of vaporization?
Enthalpy is a state function, and to a first approximation does not depend on temperature. So the change in enthalpy to go from solid to a gas directly (sublimation) at some temperature is equal to the sum of the enthalpies associated with going from a solid to a liquid (fusion) and going from a liquid to a gas (vaporization) at other temperatures.
Is enthalpy of fusion a chemical property?
A physical property
What is enthalpy of fusion vaporization?
Enthalpy of fusion/vaporization is the amount of energy added to a system to melt of boil a substance or the amount of energy removed from a system to condense or freeze a substance.
The energy required to melt one gram of a substance is known as what?
heat of fusion
What is when a substance changes from a solid to a liquid?
The heat energy, or enthalpy, associated with a solid to liquid transition is the enthalpy of fusion and that associated with a solid to gas transition is the enthalpy of sublimation.
What specific heat is the energy used to evaporate water or melt snow?
The first is called enthalpy of vaporization, the second is called enthalpy of fusion.
Why is heat energy needed to melt a solid what is this heat energy called?
This energy is the enthalpy of fusion (or latent heat of fusion).
What is the energy required to go from a solid to a liquid called?
The latent heat of fusion
How many calories are required at 0 degree Celsius to melt an ice cube with a mass of g?
What you need is the enthalpy of fusion for ice and simply multiply it by your mass. An online search shows that the enthalpy of fusion for ice is: 79.72 cal/g So calories needed to melt all your ice is just. Energy = 79.72cal/g x 25g = 242.50 calories
The amount of energy involved in melting a substance without changing its temperature is called the?
It is called the enthalpy of fusion of a substance, also known as (latent) heat of fusion.
Is energy released when separating water molecules as ice melts?
Yes, that's right.What you are referring to is called the enthalpy of fusion or the latent heat of fusion.
What is fusion in chemistry?
The Fusion is the change in enthalpy for the conversion of 1 mole or 1 gram of a solid to a liquid, at constant pressure and temperature and is usually denoted as ΔHfus.
