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Consider the data in the table. Compound Melting point (°C) Δ H fus (kJ/mol) Boiling point...

Consider the data in the table. Compound Melting point (°C) Δ H fus (kJ/mol) Boiling point (°C) Δ H vap (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 −67.0 19.27 HI −50.91 2.871 −35.38 21.16 Using the data in the table, calculate Δ S fus and Δ S vap for HBr . Δ S fus = J / ( K ⋅ mol) Δ S v a p = J / ( K ⋅ mol) Determine the entropy change when 7.50 mol HBr ( l ) freezes at atmospheric pressure. Δ S = J / K

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Solution AS fusion Altfusion ABY) Tmelting Ds fusion = 2. You kJ/mol = =2406J/mol - 86.96°c 186.19K Asfusion = 19.92 J/kmol !

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