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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?
Iodine sublimes - it does not melt
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?
687
How much energy is needed to melt 25.4 grams of L's?
What are L's? And what's the heat capacity?
Where does the energy needed to melt the iron come from?
The energy comes from the heat to melt the iron
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?
This energy is the enthalpy of fusion (or 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?
No energy is gained. On the contrary, energy is required to make ice melt.
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.
