16.3 Exercise 10

Use the standard entropy data in Appendix G to determine the change in entropy for each of the following reactions. All the processes occur at the standard conditions and 25 °C.

(a) $\text{C} \left(s ,\text{ graphite}\right) + \text{O}_{2} \left(g\right) \rightarrow \text{CO}_{2} \left(g\right)$

(b) $\text{O}_{2} \left(g\right) + \text{N}_{2} \left(g\right) \rightarrow \text{2NO} \left(g\right)$

(c) $\text{2Cu} \left(s\right) + \text{S} \left(g\right) \rightarrow \text{Cu}_{2} \text{S} \left(s\right)$

(d) $\text{CaO} \left(s\right) + \text{H}_{2} \text{O} \left(l\right) \rightarrow \text{Ca} \left(\text{OH}\right)_{2} \left(s\right)$

(e) $\text{Fe}_{2} \text{O}_{3} \left(s\right) + \text{3CO} \left(g\right) \rightarrow \text{2Fe} \left(s\right) + \text{3CO}_{2} \left(g\right)$

(f) $\text{CaSO}_{4} \cdot \text{2H}_{2} \text{O} \left(s\right) \rightarrow \text{CaSO}_{4} \left(s\right) + \text{2H}_{2} \text{O} \left(g\right)$