Briefly discuss the trends in boiling points and values of vap H listed in Table 17.2
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Briefly discuss the trends in boiling points and values of ΔvapH° listed in Table 17.2 for the hydrogen halides.
Table 17.2.
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Property Physical appearance at 298 K Melting point /K Boiling point/K AfusH (mp)/kJ mol-¹ AvapH (bp)/kJ mol-¹ A,Hº (298 K)/kJ mol-¹ A,Gº (298 K)/kJ mol Bond dissociation energy /kJ mol-¹ Bond length/pm Dipole moment/D HF Colourless gas 189 293 4.6 34.0 -273.3 -275.4 570 92 1.83 HCI Colourless gas 159 188 2.0 16.2 -92.3 -95.3 432 127.5 1.11 HBr Colourless gas 186 207 2.4 18.0 -36.3 -53.4 366 141.5 0.83 HI Colourless gas 222 237.5 2.9 19.8 +26.5 +1.7 298 161 0.45
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From the data provided in Table 172 for the hydrogen halides HF HCl HBr HI we can observe the following trends in boiling points and values of vapH Bo...View the full answer
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