[b_sharp]

"Can you explain what the Second Law of Thermodynamics is in just a sentence or two?

Do you want the classical thermodynamic explanation, the CT entropy explanation or the statistical mechanics explanation?

Classical Thermodynamic: Heat tends to spontaneously move from a concentrated state to a dispersed state. Simply put, heat tends to move from a higher temperature system to a lower temperature environment, spreading out if possible.

Classical entropy: The change in entropy is a measurement of the amount of heat dispersed. The amount of heat no longer available to the 'system' to produce work.

Statistical mechanics entropy: The disorder in a system, determined by the number of microstates possible without affecting the description of the macrostate, expressed as the log of a probability.

[Mark Felton]

Thanks for the well written summaries of entropy but I was hoping js1138 would answer the question so he could point out how the 2nd law of thermo was consistent with evolution.

socratic method...;^)