23. Which of the following processes has a negative S ? a. Evaporating 1 mole of a liquid. b. Raising the temperature of 1 Liter of water from 295K to 350K. c. Freezing of 1 mole of a liquid. d. None of the above. 24. At a constant pressure, the following reaction is exothermic: 2NO2(g)N2O4(g). Which of the following statements is true about the reaction (as written)? a. The reaction is always spontaneous. b. The reaction is spontaneous at low temperatures, but not at high temperatures. c. The reaction is spontaneous at high temperatures, but not at low temperatures. d. The reaction is never spontaneous