The compound 1,3,5-trichloro-2,4,6-trifluorobenzene is an intermediate in the conversion of hexachlorobenzene to hexafluorobenzene, and its thermodynamic properties have been examined by measuring its heat capacity over a wide temperature range (R.L. Andon and J.F. Martin, J. Chem. Soc. Faraday Trans. I, 871 (1973)). Some of the data are as follows:

Calculate the molar enthalpy relative to its value at T=0 and the Third-Law molar entropy of the compound at these temperatures. 

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T/K 14.14 Cp.m/(JK-¹mol-¹) 9.492 T/K Cp.m/JK-¹ mol-¹) 95.05 16.33 20.03 31.15 44.08 64.81 12.70 18.18 32.54 46.86 66.36 100.90 140.86 183.59 225.10 262.99 163.7 180.2 121.3 144.4 298.06 196.4