Problem: Using the following data,CompoundMelting Point (°C)   ?Hfus (kJ/mol) Boiling Point (°C)   ?Hvap (kJ/mol) HF -83.11 4.577 19.54 25.18 HCl -114.3 1.991 -84.9 17.53 HBr -86.96 2.406 -67 19.27 HI -50.91 2.871 -35.38 21.16calculate ΔSfus and ΔSvap for HF.Determine the entropy change when 2.40 mol of HF(l) boils at atmospheric pressure.

FREE Expert Solution

Step 1: ΔSvap 


Svap = HvapTb


T = 19.54 °C + 273.15 = 292.69 K


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Problem Details

Using the following data,

Compound

Melting Point (°C)   

?Hfus (kJ/mol) 

Boiling Point (°C)   

?Hvap (kJ/mol)

 HF

 -83.11

 4.577

 19.54

 25.18

 HCl

 -114.3

 1.991

 -84.9

 17.53

 HBr

 -86.96

 2.406

 -67

 19.27

 HI

 -50.91

 2.871

 -35.38

 21.16


calculate ΔSfus and ΔSvap for HF.

Determine the entropy change when 2.40 mol of HF(l) boils at atmospheric pressure.

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