Write reactions for which the enthalpy change will be a. \(\Delta H_{\mathrm{f}}^{\circ}\) for solid aluminum oxide. b. The standard enthalpy of combustion of liquid ethanol, \(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}(l) .\) c. The standard enthalpy of neutralization of sodium hydroxide solution by hydrochloric acid. d. \(\Delta H_{\mathrm{f}}^{\circ}\) for gaseous vinyl chloride, \(\mathrm{C}_{2} \mathrm{H}_{3} \mathrm{Cl}(g)\). e. The enthalpy of combustion of liquid benzene, \(\mathrm{C}_{6} \mathrm{H}_{6}(l)\). f. The enthalpy of solution of solid ammonium bromide.

a. \(2 \mathrm{Al}(s) + \frac{3}{2} \mathrm{O}_{2}(g) \rightarrow \mathrm{Al}_{2} \mathrm{O}_{3}(s)\) b. \(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}(l) + 3\mathrm{O}_{2}(g) \rightarrow 2\mathrm{CO}_{2}(g) + 3\mathrm{H}_{2}\mathrm{O}(l)\) c. \(\mathrm{NaOH}_{(aq)} + \mathrm{HCl}_{(aq)} \rightarrow \mathrm{H}_{2}\mathrm{O}(l) + \mathrm{NaCl}_{(aq)}\) d. \(2\mathrm{C}(s) + \frac{3}{2}\mathrm{H}_{2}(g) + \frac{1}{2}\mathrm{Cl}_{2}(g) \rightarrow \mathrm{C}_{2} \mathrm{H}_{3} \mathrm{Cl}(g)\) e. \(\mathrm{C}_{6} \mathrm{H}_{6}(l) + \frac{15}{2} \mathrm{O}_{2}(g) \rightarrow 6\mathrm{CO}_{2}(g) + 3\mathrm{H}_{2}\mathrm{O}(l)\) f. \(\mathrm{NH}_{4} \mathrm{Br}(s) \rightarrow \mathrm{NH}_{4}^{+}_{(aq)} + \mathrm{Br}^{-}_{(aq)}\)