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25.4 g (I2) / 254 (g/mol I2) = 0.100 (mol I2)
Melting heat = Evaporization heat:
This is because of sublimation, Iodine's Triple point (T=113°C, p=12.1 kPa)
is lower than its Melting point (113.7 °C, 100kPa).
∆Hsub(298K) = 62.42kJ/mol
Sublimation heat needed = 0.100 (mol I2) *62.42 kJ/mol = 6.24 kJ
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What must be absorbed for a solid to melt?
They must gather close together until they can't bunch anymore and then they start to melt because they ran out of space.
What can melt?
When energy is provided to any substance and its bonds are loosened, it starts melting.
What energy transformations take place in a melting ice cube?
It requires energy to melt ice, converting it into water. This energy is recovered (returned to the environment) when the water freezes. Therefore, it is convenient to think of the water as storing this energy, while it is in the liquid state.
What happens when an ice cube is heated?
It will melt! But you have to add enough energy to equal the latent heat as well as to bring the ice up to the freezing point, if it is in a freezer to start it will be at about -21degC.
How is it possible that something can have a high temperature but very little thermal energy?
Thermal energy is a product of two variables; the temperature, and the mass. If two objects having the same mass were heated to the same temperature, they would have the same thermal energy. If an object weighing ten grams was heated to 1000º C, it would have less thermal energy than an object weighing 2 tons, heated to 100º C. To demonstrate this, imagine the amounts of ice each of the above objects could melt.
How much energy is needed to melt 25.4grams of l2?
To calculate the energy needed to melt 25.4 grams of I2 (iodine), you can use the formula: energy = mass x heat of fusion. The heat of fusion for iodine is 15.52 kJ/mol. First, find the molar mass of I2 (253.8 g/mol) and then convert the mass to moles. Finally, multiply the moles by the heat of fusion to get the energy needed.
How much energy is needed to melt 254 grams of l2?
This is a trick question because "I2" is the chemical symbol for MOLECULAR iodine (your question did not say melt Iodine, it said melt I2).Only gaseous iodine is composed of I2 molecules and as it is a gas it CAN NOT melt.
How much energy is needed to melt 4.24 grams of Pd?
The energy required to melt a substance can be calculated using the heat of fusion value for that substance. The heat of fusion for palladium (Pd) is 16.74 kJ/mol. To convert grams to moles, divide the given mass by the molar mass of Pd (106.42 g/mol), then multiply by the heat of fusion value to find the energy needed to melt 4.24 grams of Pd.
How much energy is needed to melt 25.4 grams of L's?
The energy needed to melt a substance is given by its heat of fusion. For L's, this value is typically around 334 J/g. So, to melt 25.4 grams of L's, you would need 25.4 grams x 334 J/g ≈ 8476 J of energy.
Where does the energy needed to melt the iron come from?
The energy needed to melt iron typically comes from heating the iron to its melting point, which requires input of heat energy. This heat energy can be created by burning fuels, using electric resistance, or other heat sources that can raise the temperature of the iron to the point where it transitions from a solid to a liquid state.
How is the Hfusion used to calculate the energy needed to melt a mass of solid?
Grams solid mol/g Hfusion
How many joules of energy are needed to melt 54-grams of ice at its melting point?
The specific latent heat/ latent heat of fusion of ice is 333.55 J/gtherefore by using the equation E=mLE = 54 * 333.55= 18011.7 JTherefore the energy needed to melt 54 grams of ice at its melting point which is keeping it at 0 degrees Celsius is 18011.7 Joules.
How much energy is needed to melt 255.67 grams of ice?
80 calories per gram (called the latent heat of fusion) 80 x 255.67 = 20453.6 calories
Why is heat energy needed to melt a solid what is this heat energy called?
Heat energy is needed to melt a solid because it provides the kinetic energy necessary to break the bonds holding the solid's particles together. This heat energy is called latent heat of fusion.
How is the Hfusion used to calculate the needed to melt the mass of a solid?
Grams solid mol/g Hfusion
How much energy is gained by 3 grams of ice when it changes to water?
The energy needed to change ice into water is called the heat of fusion. For ice, this value is around 334 joules per gram. So, for 3 grams of ice, the energy gained when it changes to water would be around 1002 joules (334 joules/gram * 3 grams).
When iodine is heated does any iodine melt?
iodine is a substance that has an unusual property, it has the ability to sublimate, this means that it converts directly from a solid to a gas with no liquid stage at all. So no, no iodine will "melt" into a liquid, it will insted turn into a purple gas.
