Step 1: ΔSvap
T = -84.9°C + 273.15 = 188.25 K
Using the following data,
Compound Melting point (°C) ΔHfus (kJ/mol) Boiling point (°C) ΔHvap (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
Hl -50.91 2.871 -35.38 21.16
calculate ΔSfus and ΔSvap for HCl.
Determine the entropy change when 6.00 mol of HCl(s) melts at atmospheric pressure.
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