Solid CO₂ (dry ice) sublimes at 195 K, and its heat of sublimation ΔHₛubl = 25.2 kJ/mol. A block of dry ice with a mass of 12.8 g sublimes. What is the entropy change, ΔS, of the CO₂? (Enter your answer in J/K).
a. 0.156
b. 0.312
c. 0.624
d. 1.248