“…where p ref is equal to 1 bar, ΔS (J mol − 1 K − 1 ) is the standard entropy of dehydration per mole of water and ΔH (kJ mol − 1 ) is the standard enthalpy of dehydration per moles of water. Despite we could have used other more accurate models to reproduce the hydration rate [36,37], based on previous experimental work [4,31,40,43] this is constant almost up to full conversion, therefore also a linear model can effectively provide an estimate for k. The only assumption made at this stage is that powder particles are not porous.…”