Chapter 16.8, Problem 16.10P

Consider the thermal decomposition of calcium carbonate:

     ${\text{CaCO}}_{\text{3}}\left(s\right)\to \text{CaO}\left(s\right)+{\text{CO}}_{\text{2}}\left(g\right)$

(a)    Use the data in Appendix B to calculate the standard free-energy change for this reaction at 25 °C.

(b)    Will a mixture of solid CaCO₃, solid CaO, and gaseous CO₂ at 1 atm pressure react spontaneously at 25 °C to produce more CaO and CO₂?

(c)    Assuming that ΔH° and ΔS° are independent of temperature, estimate the temperature at which the reaction becomes spontaneous.