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The molar heat of fusion for Iodine is 16.7 kJ/mol. The specific heat capacity liquid Iodine is 0.054 J/g oC.

Calculate the amount of energy (in KJ) required to melt 352 g of solid Iodine and then heat the liquid to 180 oC? The melting point of Iodine is 114 oC.

Answer:

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The first step is to calculate the energy required to melt the solid iodine:

Q1 = nΔH_fus

where Q1 is the energy required, n is the number of moles, and ΔH_fus is the molar heat of fusion.

To calculate n, we need to know the molar mass of iodine, which is 126.9 g/mol.

n = m/M

where m is the mass of the sample and M is the molar mass.

n = 352 g / 126.9 g/mol = 2.78 mol

Now we can calculate Q1:

Q1 = 2.78 mol x 16.7 kJ/mol = 46.5 kJ

The second step is to calculate the energy required to heat the liquid iodine from its melting point to 180 oC:

Q2 = mCΔT

where Q2 is the energy required, m is the mass of the sample, C is the specific heat capacity, and ΔT is the temperature change.

ΔT = 180 oC - 114 oC = 66 oC

Now we can calculate Q2:

Q2 = 352 g x 0.054 J/g oC x 66 oC / 1000 = 1.1 kJ

The total energy required is the sum of Q1 and Q2:

Q_total = Q1 + Q2 = 46.5 kJ + 1.1 kJ = 47.6 kJ

Therefore, the amount of energy required to melt 352 g of solid iodine and then heat the liquid to 180 oC is 47.6 kJ.

answered
User Arsenik
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