Use data in Table 4C.1 or Appendix 2A to calculate the entropy change for

(a) The freezing of 1.00 mol H₂O(l) at 0.00°C;

(b) The vaporization of 50.0 g of ethanol, C₂H₅OH, at 351.5 K.

Transcribed Image Text:

TABLE 4C.1 Standard Enthalpies of Physical Change* Freezing AH fus% (kJ.mol-¹) point, T/K Substance Formula acetone ammonia argon benzene ethanol helium CH3COCH3 NH3 Ar C6H6 C₂H5OH He mercury Hg methane CH4 methanol CH3OH water H₂O 177.8 195.4 83.8 278.6 158.7 3.5 234.3 90.7 175.2 273.2 5.72 5.65 1.2 10.59 4.60 0.021 2.292 0.94 3.16 6.01 Boiling point, T₁/K 329.4 239.7 87.3 353.2 351.5 4.22 629.7 111.7 337.8 373.2 AHvap% (kJ.mol-¹) 29.1 23.4 6.5 30.8 43.5 0.084 59.3 8.2 35.3 40.7 (44.0 at 25 °C)