ion of entropy change is dS = dQ/T. In classical contexts, dS is expressed in units of heat called Joules per degree of absolute temperature in units Kelvin, the temperature in Centigrade plus 273.16°. The best- known physical image involves the heat-energy transfer to and from heat baths called reservoir

ferent: innovation was not necessarily considered a good thing. At the turn of the 20" century, scientists were on a mission to tidy things up. Lord Kelvin announced in 1890 that mankind had discovered everything there was to know and the role of future scientists was simply to catalogue and observe the