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# Problem: Using the following data, Compound  Melting Point (C)  delta Hfus (kJ/mol)  Boiling Point (C)  delta H vap  HF -83.11 4.577 19.54 25.18 HCl -114.3 1.991 -84.9 17.53 HBr -86.96 2.406 -67.0 19.27 Hl -50.91 2.871 -35.38 21.16calculate ΔSfus and ΔSvap for HI. answers in J/(K*mol)Determine the entropy change when 4.90 mol of HI(l) boils at atmospheric pressure. answer in (J/K)

###### FREE Expert Solution

A) Calculate ΔSfus of HI.

Tf = -50.91 °C + 273.15  = 222.24 K

ΔSfus  = 12.9 J/mol-K

B) Calculate ΔSvap of HI.

Tb = -35.38 °C + 273.15  = 237.77 K

ΔSvap  = 89.1 J/mol-K

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###### Problem Details

Using the following data,

 Compound Melting Point (C) delta Hfus (kJ/mol) Boiling Point (C) delta H vap HF -83.11 4.577 19.54 25.18 HCl -114.3 1.991 -84.9 17.53 HBr -86.96 2.406 -67.0 19.27 Hl -50.91 2.871 -35.38 21.16

calculate ΔSfus and ΔSvap for HI. answers in J/(K*mol)

Determine the entropy change when 4.90 mol of HI(l) boils at atmospheric pressure. answer in (J/K)

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Entropy concept. You can view video lessons to learn Entropy. Or if you need more Entropy practice, you can also practice Entropy practice problems.