3 ms·one thing is the energy required and another one the chemical reaction itselfby pestatije 2y agoone thing is the energy required and another one the chemical reaction itselfwesturner 2y agoendothermic and/or exothermic; in an open system with or without constant volumewesturner 2y agoWhen prompted re: ancient methods including low voltage and concrete, gemini suggested that low voltage heat in a drying geopolymer / concrete would dry it and prevent cracking.