Chilling effects the endothermic reaction between ammonium thiocyanate and barium hydroxide November 2016 rsc.li/EiC616ec
the 2nd law of thermodynamics energy spreads out the 2nd law of thermodynamics
Cup of coffee with beans by Petr Kratochvil [Public domain], via Wikimedia Commons Et baal.jpg by Einar Helland Berger (Own work) [CC BY-SA 2.5 (http://creativecommons.org/licenses/by-sa/2.5)], via Wikimedia Commons
a process that releases heat exothermic a process that releases heat reactants energy DH products Et baal.jpg By Einar Helland Berger (Own work) [CC BY-SA 2.5 (http://creativecommons.org/licenses/by-sa/2.5)], via Wikimedia Commons
energy spreads out: entropy increases NH3 NH3 NH3 energy spreads out: entropy increases NH3 NH4+ SCN- OH- OH- NH4+ SCN- NH4+ H2O SCN- H2O Ba2+ Ba2+ H2O SCN- OH- OH- SCN- NH4+ SCN- SCN- Ba2+ SCN- Ba2+ H2O more heat energy, but contained in ordered solid less heat energy, but spread out more in liquid and gas: disordered