What are the products of aerobic respiration?

Water (H2O) and Carbon Dioxide (CO2) (also Energy)

Spontaneity tell us the direction of the reaction, but not how fast it goes. gibbs free energy brings together enthalpy, entropy and temperature in one easy formula. g = h - ts. and, finally the sign of delta g is always negative for a spontaneous reaction.

Decomposition is the cycle at which bacteria breaks down any organic material into the soil