Which statement is true regarding the sublimation of dry ice (solid CO2)?
a. ΔH is positive, ΔS is negative, and ΔG is positive at all temperatures.
b. ΔH is positive, ΔS is positive, and ΔG is positive at low temperature and negative at high temperature.
c. ΔH is negative,ΔS is positive, and ΔG is negative at all temperatures.
d. ΔH is negative, ΔS is negative, and ΔG is negative at low temperature and positive at high temperature.
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