Use values of r_cov (Table 17.1) to estimate the X—Y bond lengths of ClF, BrF, BrCl, ICl and IBr. Compare the answers with values in Fig. 17.8 and Table 17.3, and comment on the validity of the method of calculation.

Table 17.1

Table 17.3.

Figure 17.8

Transcribed Image Text:

Property Atomic number, Z Ground state electronic configuration Enthalpy of atomization, A H°(298 K)/kJ mol-1 Melting point, mp/K Boiling point, bp/K Standard enthalpy of fusion of X2, Afus H (mp)/kJ mol-¹ Standard enthalpy of vaporization of X₂, AapH (bp)/kJ mol-¹ First ionization energy, IE₁/kJ mol-¹ AEAH₁ (298 K)/kJ mol-1 AhydH(X, g)/kJ mol-¹ Ahyds (X, g)/J K mol AhydG (X. g)/kJ mol-¹ Standard reduction potential, E (X₂/2X)/V Covalent radius, reov/pm Ionic radius, Tion for X"/pm* van der Waals radius, rv/pm Pauling electronegativity, x P F 9 79 53.5 85 0.51 6.62 1681 -328 -504 -150 -459 +2.87 71 [He]2s²2p³ [Ne]3s²3p³ [Ar]3d¹04s²4p [kr]4d¹05s²5p²³ 133 17 135 4.0 121 172 239 6.40 20.41 1251 -349 -361 -90 -334 +1.36 99 181 180 Br 3.2 35 112 266 332 10.57 29.96 1140 -325 -330 -70 -309 +1.09 114 196 195 53 3.0 107 387 457.5 15.52 41.57 1008 -295 -285 -50 -270 +0.54 133 220 215 2.7