For each of the following processes, predict the algebraic sign of r H, r S,

For each of the following processes, predict the algebraic sign of Δ_r H°, Δ_r S°, and Δ_rG°. No calculations are necessary; use your common sense.
(a) The decomposition of liquid water to give gaseous oxygen and hydrogen, a process that requires a considerable amount of energy.
(b) Dynamite is a mixture of nitroglycerin, C₃H₅N₃O₉, and diatomaceous earth. The explosive decomposition of nitroglycerin gives gaseous products such as water, CO₂, and others; much heat is evolved.
(c) The combustion of gasoline in the engine of your car, as exemplified by the combustion of octane.

Transcribed Image Text:

2 C3H18(g) + 25 0₂(g) → 16 CO₂(g) + 18 H₂O(g)