Thank you for the comments, Anthropic.

Sorry to belabor this. I have one additional comment on Physical Chemistry and ponds. A pond is like a chemical reaction between organic molecules. The outcome is almost never 100% of the desired product but a series of products and side products with their own Gibbs free energy (remember, deltaG=deltaH-TdeltaS - I don’t know how to put in greek characters here)

A+B->C+D x%
->E+F y% etc.

Why? Because we are talking about an ensemble of molecules each with their own kinetic & rotational energy and each bond with its own vibrational energy and each electron in their own excited state - nothing is at rest. The result is often temperature dependent, concentration dependent (think oxygen) and scavenger dependent (eg. free radical scavengers in chain reactions). Yields of the desired product are seldom over 70%. Is this an analogy for a pond?